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Most vaccines are derived from

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by GMAT Hacker » Tue Aug 24, 2010 10:43 pm
Most vaccines are derived from weakened or killed strains of the same
virus that they prevent, unlike the derivation of smallpox vaccine
from a different virus altogether.

(A) the derivation of smallpox vaccine from a different virus altogether

(B) smallpox vaccine, which is derived from a different virus altogether

(C) smallpox's vaccine, which gets derived from a different virus altogether

(D) when smallpox vaccine is derived from an altogether different virus

(E) the altogether different virus from which smallpox vaccine is derived

QA later.[/u]
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by Fiji_surf » Tue Aug 24, 2010 10:52 pm
My guess is "B"
It is a parallel structure: we are comparing "most vaccines" to one vaccine, which leaves us with "B" or "C".
Then I choose B, because of parallel between "are" and "is". Also "smallpox's" sounds weird.
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by mun1shk » Tue Aug 24, 2010 11:04 pm
B IMO

Vaccine should be compared to vaccine, So A, D, E out...

In C, apart for possessive smallpox's, it also says.. gets derived.. which can mean it gets derived on it own.. which is not true..
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by hi.itz.mani » Wed Aug 25, 2010 5:01 am
IMO B

second the reasoning made in last post

Thanks!
-Mani
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by scorpionz » Wed Aug 25, 2010 5:39 am
IMO: B

OA Plz.??
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by GMAT Hacker » Thu Aug 26, 2010 6:50 am
scorpionz wrote:IMO: B

OA Plz.??

QA B
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by ankurmit » Thu Aug 26, 2010 10:01 pm
IMO B.

Clear parallelism
--------
Ankur mittal
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