While studying the genetic makeup of corn, a new class of

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BTGmoderatorDC: Moderator; Posts: 7187; Joined: Thu Sep 07, 2017 4:43 pm; Followed by:23 members

While studying the genetic makeup of corn, a new class of

by BTGmoderatorDC » Sat Nov 17, 2018 4:19 pm

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While studying the genetic makeup of corn, a new class of mutant genes was discovered by Barbara McClintock, a discovery which led to greater understanding of cell differentiation.

A. a new class of mutant genes was discovered by Barbara McClintock, a discovery which led
B. a new class of mutant genes in corn were discovered by Barbara McClintock, leading
C. Barbara McClintock discovered a new class of mutant genes, and it led
D. Barbara McClintock discovered a new class of mutant genes, a discovery that led
E. Barbara McClintock, who discovered a new class of mutant genes, leading

OA D

Source: GMAT Prep

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Source: Beat The GMAT — Sentence Correction | Sat Nov 17, 2018 4:19 pm

deloitte247: Legendary Member; Posts: 2214; Joined: Fri Mar 02, 2018 2:22 pm; Followed by:5 members

edited

by deloitte247 » Sun Nov 25, 2018 12:12 am

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Option A :- Incorrect
This has a wrongly placed modifier. It is assumed that the clause that is to be treated has to begin with the subject of the sentence.

Option B :- Incorrect
This option suffers same fate as option A above, the modifier is being misplaced and the subject of the sentence which is Babara McClintock has to kick start the long phrase.

Option C :- Incorrect
that led will be chosen over it led. This is a sequential statement from the preceding one so what Babara McClintock did 'that led'is a better choice that should follow.

Option D :- correct
This option is very straightforward and it has brevity. It contains no grammatical errors, modifiers well placed and the subject was already at at the right place.

Option E :- Incorrect
This option is quite similar to to option D above and looks to be the best choice too. But the use of the relative pronoun 'who' which makes the slightly shows tautology and inconciseness makes the option looks terrible.