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# Researchers have announced that the magnetic fields emitted

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Director
Joined: 06 Jan 2008
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Researchers have announced that the magnetic fields emitted [#permalink]

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13 May 2008, 07:22
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Question Stats:

78% (00:46) correct 22% (00:58) wrong based on 838 sessions

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Researchers have announced that the magnetic fields emitted by one manufacturer’s
security surveillance system, of which type there are 200,000 worldwide, can interfere
with pacemakers and that
this interaction can bring on missed or irregular heartbeats,
nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and
C. of which type there are 200,000 worldwide, they can interfere with pacemakers and
D. 200,000 of which type exist worldwide, interfering with pacemakers, and
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and
Director
Joined: 05 Jan 2008
Posts: 673
Re: Researchers have announced that the magnetic fields emitted [#permalink]

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13 May 2008, 11:52
A for me

A. of which type there are 200,000 worldwide, can interfere with pacemakers and that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and -> awkward construction
C. of which type there are 200,000 worldwide, they can interfere with pacemakers and
D. 200,000 of which type exist worldwide, interfering with pacemakers, and
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and
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Director
Joined: 30 Jun 2007
Posts: 755
Re: Researchers have announced that the magnetic fields emitted [#permalink]

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13 May 2008, 16:33
Good one!

A. of which type there are 200,000 worldwide, can interfere with pacemakers and that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and [ of which and that type – redundant + “which” incorrectly modifies type – eliminate it]
C. of which type there are 200,000 worldwide, they can interfere with pacemakers and [“they” can not refer to Singular manufacturer’s security surveillance system – eliminate it]
D. 200,000 of which type exist worldwide, interfering with pacemakers, and [ 200,000 of which type is awkward + interfering and can bring is not parallel to can bring – eliminate it]
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and [“and” incorrectly coordinates with main clause – eliminate it]

VP
Joined: 17 Jun 2008
Posts: 1295
Re: Source: GMAT Set Researchers have announced that the [#permalink]

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07 Aug 2008, 18:37
humtum0 wrote:
Source: GMAT Set
Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and
C. of which type there are 200,000 worldwide, they can interfere with pacemakers and
D. 200,000 of which type exist worldwide, interfering with pacemakers, and
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and

Lets eliminate Wrong options .A is good but ;lets explore for a better option

B ->of which and of that are redundant -> ELIMINATE
C->they can is wrong since does not continue the previous sentence
D->interfering is not paralel with interaction can
E->too many ands is never good .Also existing worldwide and can interfere is not correct
A -> is perfect

IMO A
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Re: Source: GMAT Set Researchers have announced that the [#permalink]

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08 Aug 2008, 20:51
OA- D
Manager
Joined: 28 Aug 2006
Posts: 133
Re: Source: GMAT Set Researchers have announced that the [#permalink]

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13 Aug 2008, 07:40
No its not GMATPrep. What I read in various forums is GMAT Sets are retired GMAT Tests.
http://www.manhattangmat.com/forums/gma ... t3757.html
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Re: Researchers have announced that the magnetic fields emitted [#permalink]

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15 Jun 2015, 07:01
good question. Bumping up for more review
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Re: Researchers have announced that the magnetic fields emitted [#permalink]

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15 Jun 2015, 07:19
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mymba99 wrote:
Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.

Indeed a good Question would love to review this one...

Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system,of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and that - Correct

B. of which, worldwide , there are 200,000 of that type, and which can interfere with pacemakers, and - Incorrect

C. of which type there are 200,000 worldwide, they can interfere with pacemakers and - Incorrect

D. 200,000 of which type exist worldwide, interfering with pacemakers, and - Incorrect

E. 200,000 of that type existing worldwide and can interfere with pacemakers, and - Incorrect

Hence IMHO (A) is the best...

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Re: Researchers have announced that the magnetic fields emitted [#permalink]

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04 Feb 2016, 07:39
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The quick fix for this question is that the Researchers announce two things, which are best expressed parallelly in relative clauses that start with ‘that’. Therefore, we require another that after the conjunction ‘and’. A cursory glance at the end of the choices reveals that only choice A sticks to this norm. Hence A; of course there may be other errors too in the wrong choices.
But on the D-day, this much might be good enough for some with time pressure.
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Re: Researchers have announced that the magnetic field emitted by one [#permalink]

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26 Apr 2016, 01:57
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inakihernandez wrote:
Researchers have announced that the magnetic field emitted by one brand of security surveillance system, of which type there are 200.000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats,nausea and even fainting.

(a) of which type there are 200.000 worldwide, can interfere with pacemakers and that

(b) of which, worldwide, there are 200.000 of that type, and which can interfere with pacemakers, and

(c) of which type there are 200.000 worldwide, they can interfere with pacemakers and

(d) 200.000 of which type exist worldwide, interfering with pacemakers, and

(e) 200.000 of that type existing worldwide and can interfere with pacemakers, and

Hi,
Just one ERROR which can eliminate all wrong choices is VERB of main clause..
" Researchers have announced that the magnetic field emitted by one brand of security surveillance system" requires a VERB, which is there ONLY in A - CAN..
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Re: Researchers have announced that the magnetic field emitted by one [#permalink]

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26 Apr 2016, 02:15
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inakihernandez wrote:
Can someone help me with this question?

A: that is introducing a new clause... but only make sense if it is parallel to researchers have announced that the magnetic fields... and that this interaction...

B: is out. The two which make the sentence confusing.

C: They refers to researchers or magnetic fields. But logically must refer to magnetic fields, otherwise the sentence have no sense. Why is C wrong?

D: interfering is modifying magnetic fields. I don't see the problem to state later: this interaction....

E: Is out. The use of and make the two parts equal, so existing must be wrong or we should eliminate the first and...

whenever you are looking at such long sentences, always look if your Subject has a VERB by hiding everything else..
lets see C
Researchers have announced that the magnetic field emitted by one brand of security surveillance system, of which type there are 200.000 worldwide, they can interfere with pacemakers and this interaction can bring on missed or irregular heartbeats,nausea and even fainting. ---- NO verb
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Re: Researchers have announced that the magnetic fields emitted [#permalink]

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18 Jun 2017, 04:38
Researchers have announced that the magnetic fields emitted by one manufacturer’s
security surveillance system, of which type there are 200,000 worldwide, can interfere
with pacemakers and that this interaction can bring on missed or irregular heartbeats,
nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and
C. of which type there are 200,000 worldwide, they can interfere with pacemakers and
D. 200,000 of which type exist worldwide, interfering with pacemakers, and
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and

Straight A
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Re: Researchers have announced that the magnetic fields emitted [#permalink]

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18 Jun 2017, 07:29
Merged topics. Please, search before posting questions!
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Re: Researchers have announced that the magnetic fields emitted [#permalink]

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25 Oct 2017, 22:54
Parallelism issue; Researchers have announced THAT the magnetic fields....and THAT.

Only A does that.
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Director
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Re: Researchers have announced that the magnetic fields emitted [#permalink]

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27 Oct 2017, 03:06
mymba99 wrote:
Researchers have announced that the magnetic fields emitted by one manufacturer’s
security surveillance system, of which type there are 200,000 worldwide, can interfere
with pacemakers and that
this interaction can bring on missed or irregular heartbeats,
nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and
C. of which type there are 200,000 worldwide, they can interfere with pacemakers and
D. 200,000 of which type exist worldwide, interfering with pacemakers, and
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and

That AND That,,,,only A does it,,,,
all other options have missing S-V
Senior Manager
Joined: 13 Oct 2016
Posts: 297
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Researchers have announced that the magnetic fields emitted [#permalink]

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24 Nov 2017, 22:12
Well i would apply the parallelism technique as explained by GMATNinja ,

First lets see if there is any parallelism trigger such as or,but, and (its the most common seen on the GMAT)

Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.

As we could see from the above sentence their is the "and" word.

Now we need to check the Stem of the sentence which is "Researchers have announced" .

Lets construct the sentences before the parallelism trigger and after the parallelism trigger and compare:

Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers --(1)

Researchers have announced that this interaction(Magnetic fields with the pacemaker) can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting. --(2)

The only option that makes sense is Option A.

Hope the above explanation helps.

If your new to the whole parallelism concept or want to get a better picture of the following concept please refer to the below video link which i found immensely useful:

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Researchers have announced that the magnetic fields emitted   [#permalink] 24 Nov 2017, 22:12
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