SC -15 Distinguish between : GMAT Sentence Correction (SC)
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SC -15 Distinguish between

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07 Jun 2005, 07:28
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Hi,

Consider the following SC question:

15. In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes mood swings.
which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis.

(A) mood swings, which may be violent without their being grounded in mental disease, from genuine
manic-depressive psychosis
(B) mood swings, perhaps violent without being grounded in mental disease, and genuine
manic-depressive psychosis ,
(C) between mood swings, which may be violent without being grounded in mental disease, and genuine
manic-depressive psychosis
(D) between mood swings, perhaps violent without being grounded in mental disease, from genuine
manic-depressive psychosis
(E) genuine manic-depressive psychosis and mood swings, which may be violent without being grounded
in mental disease

Obviously this is an idiom-testing question. Now, the clear choice here is C, which uses the idiom distinguish between X and Y correctly.

Here is my question: In the answer choice A, "their" is used unnecessarily in the relative clause, "which may be violent without their being grounded". Now, if the word "their" is taken off from choice A, wouldn't A be a correct answer as well? I guess my question is, isn't distinguish A from B is a valid idiom as well?

Thanks,
Venkat
If you have any questions
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07 Jun 2005, 10:56
yes, it definetly is a correct idiom, but the structure of A is weird, the use of their makes no sense and changes the meaning.
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07 Jun 2005, 22:49
Venkat, both
distinguish A from B
distinguish between A and B
are valid.

It should be C since it uses the right idiom without any flaws.
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08 Jun 2005, 05:10
sparky wrote:
C. to distinguish between X and Y

I know the answer to the question is C. Has anyone even read my question?
Ironically, this is my classic faux pas in GMAT practice tests....
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08 Jun 2005, 07:50
vkat007 wrote:
sparky wrote:
C. to distinguish between X and Y

I know the answer to the question is C. Has anyone even read my question?
Ironically, this is my classic faux pas in GMAT practice tests....

yes you are right. if we eliminate "their" in A), A) would be correct as well, because "distinguish between X and Y" as well as "distinguish from" is a correct idiom.
_________________

If your mind can conceive it and your heart can believe it, have faith that you can achieve it.

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08 Jun 2005, 08:13
so between always have to follow after distinguish or distinguishes?
08 Jun 2005, 08:13
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