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In laboratory rats

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by bhumika.k.shah » Thu Feb 04, 2010 12:54 am
In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane, which is a substance that promotes blood clotting, but not seriously interfering with the production of prostacyclin, which prevents clotting.

(A) which is a substance that promotes blood clotting, but not seriously interfering

(B) a substance that promotes blood clotting, but not seriously interfering

(C) a substance that promotes blood clotting, but does not seriously interfere

(D) which is a substance to promote blood clotting, but does not seriously interfere

(E) which is a substance that promotes blood clotting, but not a serious interference

Whats wrong with B ?
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by papgust » Thu Feb 04, 2010 1:13 am
The correct idiom is "X, but Y". Y here does not have a verb.

So, i think C is better than B which has a verb.
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by viidyasagar » Thu Feb 04, 2010 1:42 am
In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane, which is a substance that promotes blood clotting, but not seriously interfering with the production of prostacyclin, which prevents clotting.

(A) which is a substance that promotes blood clotting, but not seriously interfering

(B) a substance that promotes blood clotting, but not seriously interfering

(C) a substance that promotes blood clotting, but does not seriously interfere

(D) which is a substance to promote blood clotting, but does not seriously interfere

(E) which is a substance that promotes blood clotting, but not a serious interference

Concept tested - Parallelism (primary concept) and redundancy (secondary concept)

Subject - A low dose of aspirin

To maintain parallelism, right construction must read "A low dose of aspirin suffices (something).........but does not suffice/ any other verb"....only C and D follow the rule

additionally, Promotes clotting... is parallel with ....Prevents clotting....i choose C here itself

Further, in D "which is a substance" - seems unnecessary...
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by bhumika.k.shah » Thu Feb 04, 2010 5:28 am
viidyasagar wrote:
To maintain parallelism, right construction must read "A low dose of aspirin suffices (something).........but does not suffice/ any other verb"....only C and D follow the rule
Wow! i couldnt point out this flaw ! Thanks :-)
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