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At ground level, ozone is a harmful pollutant, but in the stratosphere

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At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post Updated on: 04 Jan 2019, 01:52
3
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A
B
C
D
E

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Question Stats:

85% (00:52) correct 15% (01:02) wrong based on 179 sessions

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At ground level, ozone is a harmful pollutant, but in the stratosphere it shields the Earth from the most biologically harmful radiation emitted by the Sun, radiation in the ultraviolet band of the spectrum.

(A) in the stratosphere
(B) in the stratosphere, in which
(C) it is in the stratosphere in which
(D) in the stratosphere where
(E) it is in the stratosphere and

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Originally posted by perfectstranger on 16 Jun 2009, 16:56.
Last edited by Bunuel on 04 Jan 2019, 01:52, edited 2 times in total.
Edited the question.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 16 Jun 2009, 17:06
Confused between A and D , will go with A for conciseness
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New post 16 Jun 2009, 18:00
IMO A....
somehow I feel placing where in choice D makes the sentence ask for more placeholders...the sentence does not completes
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 16 Jun 2009, 18:34
Even I feel the same. I thought of D but where makes the sentence incomplete...
I go for A.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 17 Jun 2009, 01:29
A it is.

D makes the sentence incomplete.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 17 Jun 2009, 03:50
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New post 17 Jun 2009, 07:52
Could you provide explanation for the choices ? I know the answer so instead of saying A,B,C,D and E please provide the logic and rules behind it. I wrote the question here to learn what was my mistake and why this mistake arised.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 17 Jun 2009, 09:51
1
I also think the answer is A. This is a construction that follows the "A but B" format, which typically requires that A and B be parallel in structure. Looking at the choices:

(A) in the stratosphere - correctly contrasts with 'at the ground level'
(B) in the stratosphere, in which - in which is redundant, already contains 'in'
(C) it is in the stratosphere in which - distorts meaning, awkward
(D) in the stratosphere where - breaks parallelism, 'where' redundant
(E) it is in the stratosphere and - distorts meaning, breaks parallelism
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New post 18 Jun 2009, 05:45
Another A...Using D would seem to make an incomplete sentence...
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 19 Jun 2009, 09:57
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perfectstranger wrote:
4. At ground level, ozone is a harmful pollutant, but in the stratosphere it shields the Earth from the most biologically harmful radiation emitted by the Sun, radiation in the ultraviolet band of the spectrum.
(A) in the stratosphere
(B) in the stratosphere, in which
(C) it is in the stratosphere in which
(D) in the stratosphere where
(E) it is in the stratosphere and


B, C and E require the additional verb.e.g.
In my class, Kate is intelligent, but in another class in which/where there are other bright students, she is not noticeable. The example above must have the similar structure to be right. E is wordy. So A remains correct.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 22 Sep 2017, 01:06
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perfectstranger wrote:
4. At ground level, ozone is a harmful pollutant, but in the stratosphere it shields the Earth from the most biologically harmful radiation emitted by the Sun, radiation in the ultraviolet band of the spectrum.
(A) in the stratosphere
(B) in the stratosphere, in which
(C) it is in the stratosphere in which
(D) in the stratosphere where
(E) it is in the stratosphere and


Because of the very vastness of grammar, I have always found the elimination method to get correct answer in SC.

I will try to reason it via "Process of Elimination" :

(A) in the stratosphere Parallel to "at the ground level" I donot find any error. So lets leave it now
(B) in the stratosphere, in which - which is unnecessary. Eliminated
(C) it is in the stratosphere in which Same as B
(D) in the stratosphere where - Where is unnecessary. Eliminated
(E) it is in the stratosphere and - No need of conjunction. Eliminated.

Now we can see, we are left with only option A. And others have clear errors.
HENCE A.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 04 Jan 2019, 00:47
rahulk28011 wrote:
perfectstranger wrote:
4. At ground level, ozone is a harmful pollutant, but in the stratosphere it shields the Earth from the most biologically harmful radiation emitted by the Sun, radiation in the ultraviolet band of the spectrum.
(A) in the stratosphere
(B) in the stratosphere, in which
(C) it is in the stratosphere in which
(D) in the stratosphere where
(E) it is in the stratosphere and


Because of the very vastness of grammar, I have always found the elimination method to get correct answer in SC.

I will try to reason it via "Process of Elimination" :

(A) in the stratosphere Parallel to "at the ground level" I donot find any error. So lets leave it now
(B) in the stratosphere, in which - which is unnecessary. Eliminated
(C) it is in the stratosphere in which Same as B
(D) in the stratosphere where - Where is unnecessary. Eliminated
(E) it is in the stratosphere and - No need of conjunction. Eliminated.

Now we can see, we are left with only option A. And others have clear errors.
HENCE A.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 04 Jan 2019, 01:45
kakkar70 wrote:
rahulk28011 wrote:
perfectstranger wrote:
4. At ground level, ozone is a harmful pollutant, but in the stratosphere it shields the Earth from the most biologically harmful radiation emitted by the Sun, radiation in the ultraviolet band of the spectrum.
(A) in the stratosphere
(B) in the stratosphere, in which
(C) it is in the stratosphere in which
(D) in the stratosphere where
(E) it is in the stratosphere and


Because of the very vastness of grammar, I have always found the elimination method to get correct answer in SC.

I will try to reason it via "Process of Elimination" :

(A) in the stratosphere Parallel to "at the ground level" I donot find any error. So lets leave it now
(B) in the stratosphere, in which - which is unnecessary. Eliminated
(C) it is in the stratosphere in which Same as B
(D) in the stratosphere where - Where is unnecessary. Eliminated
(E) it is in the stratosphere and - No need of conjunction. Eliminated.

Now we can see, we are left with only option A. And others have clear errors.
HENCE A.


Hi

With usage of but .....it should be a clause on each side of but and should be parallel.

Therefore, A is correct because in the stratosphere(prepositional phrase) followed by a Clause.

And but is preceded by a Clause too

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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 09 Jan 2019, 17:35
perfectstranger wrote:
At ground level, ozone is a harmful pollutant, but in the stratosphere it shields the Earth from the most biologically harmful radiation emitted by the Sun, radiation in the ultraviolet band of the spectrum.



(A) in the stratosphere - Correct
(B) in the stratosphere, in which - Wrong: 1) Parallelism issue. 2) Structure issue
(C) it is in the stratosphere in which - Wrong: Parallelism issue
(D) in the stratosphere where - Wrong: 1) Parallelism issue 2) Structure issue
(E) it is in the stratosphere and - Wrong: 1) Parallelism issue 2) Meaning issue
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 03 May 2019, 06:45
why in answer A we did not have a comma after but !?
if it must be parallel ,why we did not separate "in the stratosphere" by comma
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 03 May 2019, 19:47
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09173140521 wrote:
why in answer A we did not have a comma after but !?
if it must be parallel ,why we did not separate "in the stratosphere" by comma
It is not essential to put commas around in the stratosphere.

More generally, keep in mind that the GMAT tests commas in a very limited number of ways (such as comma splices), and this is not one of them.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 03 May 2019, 23:07
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At ground level, ozone is a harmful pollutant, but in the stratosphere it shields the Earth from the most biologically harmful radiation emitted by the Sun, radiation in the ultraviolet band of the spectrum.

May I know why a comma is required after "but"?

If you put the conjunction 'but' in parenthesis, then it becomes dispensable to the meaning. Without the conjunction, the whole sentence might become a fused sentence.

I doubt whether a comma is normally used after a co-ordinate conjunction
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere  [#permalink]

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New post 03 May 2019, 23:37
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Because 'but' is not a modifier. it is a conjunction. On the other hand, at ground level is a prepositional modifier. Modifiers are usually separated from what they modify by a comma.
At the same time, could you see that the phrase 'in the stratosphere' is not separated by a comma from what it follows. That is because that phrase is indispensable to the meaning. You may that without the prepositional modifier the second arm has no sensible meaning.
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Re: At ground level, ozone is a harmful pollutant, but in the stratosphere   [#permalink] 03 May 2019, 23:37
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