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The peaks of a mountain range, acting like rocks in a streambed, produ

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The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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06 Jul 2009, 19:50
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The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and toughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."

(A) crests and toughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and toughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and toughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and toughs although the air that forms them is moving rapidly, are

(E) stationary crests and toughs although they are formed by rapidly moving air, is
[Reveal] Spoiler: OA

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Last edited by souvik101990 on 22 Oct 2017, 22:46, edited 4 times in total.
Reformatted the question.

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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06 Jul 2009, 21:10
Two Subjects

Two S-V cases..hence between C&E

is it C?
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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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07 Jul 2009, 09:06
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MY pick is C as well as the wave can not form stationary crests....is refers to the air pattern

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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04 Feb 2010, 20:34
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The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them: the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as “standing waves.”

A. crests and troughs that remain stationary although the air that forms them is moving rapidly, are
B. crests and troughs that remain stationary although they are formed by rapidly moving air, are
C. crests and troughs that remain stationary although the air that forms them is moving rapidly, is
D. stationary crests and troughs although the air that forms them is moving rapidly, are
E. stationary crests and troughs although they are formed by rapidly moving air, is

OG 2011
OG 2012 SC95 P674
I want to understand why the option (E) is "awkward and unclear".

Last edited by Skywalker18 on 22 Apr 2017, 07:31, edited 5 times in total.
Corrected the question

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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05 Feb 2010, 06:49
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E. stationary crests and troughs although they are formed by rapidly moving air, is

This option omits the restrictive relative clause "that remain stationary". One of the requirements of a restrictive clause is that the sentence wouldn't make sense or mean the same thing without it. In this case, "although they are formed by rapidly moving air" is providing a counterpoint without having a main point to counter.

Maybe another example would illustrate this best:

Bananas that are yellow are tastiest although brown ones are good for baking. <--Correct
Bananas are tastiest although brown ones are good for baking. <--"Awkward and unclear" as OG-11 would put it

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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05 Feb 2010, 13:30
I actually think C is correct; I was only attempting to explain why E wasn't the best choice.

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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28 Feb 2010, 12:26
Using the "split" principle, we can create 3-2 split between options A, B and C, and the remaining options. D and E are more concise (principle of concision) hence A, B and C are ruled out. "Standing waves" refer to the "pattern" which is the subject, hence the agreeing verb should be singular "is".

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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02 Mar 2010, 09:21
sacmanitin wrote:
The Peaks of a mountain range, acting like rocks in a streambed,produce ripples in the air flowing over them;the resulting flow with crests and troughs that remain stationary although the air that forms them is moving rapidly,arepattern, known as "standing waves".

A. crests and troughs that remain stationary although the air that forms them is moving rapidly,are
B. crests and troughs that remain stationary although they are formed by rapidly moving air ,are
C. crests and troughs that remain stationary although the air that forms them is moving rapidly,is
D. stationary crests and troughs although the air that forms them is moving rapidly,are
E. stationary crests and troughs although they are formed by rapidly moving air ,is

friends its a OG-11 SC question , i want to understand why the option (E) is "awkward and unclear".Thanks in advance.

The resulting flow is the subject after the comma. Thus, eliminate everything except for C and E.

E is out because they do not refer to the air and distorts the original meaning of the sentence.

Thus, I think it's C, too.

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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02 Mar 2010, 11:56
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Use of although is the key here. It should be contrasting two things which is clearly visible in C and not in E.

Take away -->

1) "although" needs to be used to contrast two parallel noun phrases or phrases. "X although Y" X and Y needs to be in parallel
2) One of the requirements of a restrictive clause is that the sentence wouldn't make sense or mean the same thing without it."That remains stationary"

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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16 Mar 2010, 07:44
bizaru wrote:
The resulting flow is the subject after the comma. Thus, eliminate everything except for C and E.

E is out because they do not refer to the air and distorts the original meaning of the sentence.

Thus, I think it's C, too.

I also think the answer is C. It's a problem of subject-verb agreement, and flow being singular, the verb should be "is" and not "are". That's why only C and E are taking in consideration.

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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19 Mar 2010, 01:17
sacmanitin wrote:
The Peaks of a mountain range, acting like rocks in a streambed,produce ripples in the air flowing over them;the resulting flow with crests and troughs that remain stationary although the air that forms them is moving rapidly,arepattern, known as "standing waves".

A. crests and troughs that remain stationary although the air that forms them is moving rapidly,are
B. crests and troughs that remain stationary although they are formed by rapidly moving air ,are
C. crests and troughs that remain stationary although the air that forms them is moving rapidly,is
D. stationary crests and troughs although the air that forms them is moving rapidly,are
E. stationary crests and troughs although they are formed by rapidly moving air ,is

friends its a OG-11 SC question , i want to understand why the option (E) is "awkward and unclear".Thanks in advance.

For the flow are is wrong. CHoice C and E are left. In E is seems that only crests are stationary not troughs. Answer is C
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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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21 Mar 2010, 09:20
I pick C.

Same logic as the above.

What's the OA?

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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23 Mar 2010, 08:33
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sacmanitin wrote:
The Peaks of a mountain range, acting like rocks in a streambed,produce ripples in the air flowing over them;the resulting flow with crests and troughs that remain stationary although the air that forms them is moving rapidly,arepattern, known as "standing waves".

A. crests and troughs that remain stationary although the air that forms them is moving rapidly,are
B. crests and troughs that remain stationary although they are formed by rapidly moving air ,are
C. crests and troughs that remain stationary although the air that forms them is moving rapidly,is
D. stationary crests and troughs although the air that forms them is moving rapidly,are
E. stationary crests and troughs although they are formed by rapidly moving air ,is

friends its a OG-11 SC question , i want to understand why the option (E) is "awkward and unclear".Thanks in advance.

E. stationary crests and troughs although they are formed by rapidly moving air ,is

its unnecessary passive and it changes the meaning as well
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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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19 Jun 2010, 15:48
C for me as well
Earlier i thought of E as an option but I'm wrong (E chnages the meaning)
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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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02 Jul 2010, 07:24
C for me.

option (E) is worng for few reasons:

stationary crests and troughs although they are formed by rapidly moving air is

(1) 'stationary' applies to crests only which is incorrect
(2) the sentence is supposed to show contrast with the help of 'although'...something like this...."crests and troughs are [stationary] although the air that forms them is [rapidly moving]....option (E) is not showing this contrast and is changing the meaning.

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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20 Jul 2010, 11:30
subject - flow - singular
verb needs to be singular -- hence eliminate answer choice with 'are' in it.

Left with C and E.

E is definitely awkward to read. Hence C should be correct answer choice.

Thanks,
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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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22 Oct 2010, 10:31
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The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over
them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms
them is moving rapidly, are
known as "standing waves."

A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although they are formed by rapidly moving air, is

(E) stationary crests and troughs although the air that forms them is moving rapidly, are

Last edited by Gnpth on 07 Oct 2014, 03:28, edited 1 time in total.
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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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22 Oct 2010, 10:48
D makes more sense, but I see that I am wrong !!!!! Give us all 5 choice.

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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22 Oct 2010, 20:49
Here you go. I have extracted this question from OG10.

A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are
(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is
(D) stationary crests and troughs although they are formed by rapidly moving air, is

(E) stationary crests and troughs although the air that forms them is moving rapidly, are

I can't tell between C&D, why one is preferred to the other. Can anyone help out?

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Re: The peaks of a mountain range, acting like rocks in a streambed, produ [#permalink]

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22 Oct 2010, 21:26
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You forgot, "... is moving rapidly" on your original post.

In my opinion, C is right because of the meaning of crests and troughs themselves.

Crest means the highest part of a hill or mountain range.

So it's probably expected to be stationary to begin with.

Air forms troughs but not crest.

So it is with Crest alone and troughs that blah blah blah.
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Re: The peaks of a mountain range, acting like rocks in a streambed, produ   [#permalink] 22 Oct 2010, 21:26

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