64Roger Penrose

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real2008
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Topic: 64Roger Penrose
PostFri Jul 03, 2009 3:03 am Reply with quote
The work of mathematician Roger Penrose in the early 1970s, on the geometry of what are called aperiodic tiles, turned out to describe the architecture of a previously unknown class of crystals.
(A) what are called aperiodic tiles, turned out to describe
(B) what is called aperiodic tiles, describes
(C) aperiodic tiles, describing
(D) so-called aperiodic tiles, describe
(E) aperiodic tiles, it turned out to describe

Why not B?
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goelmohit2002
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PostFri Jul 03, 2009 1:22 pm Reply with quote
Probably because tile"s" is plural....

IMO if we do not know whether the thing is singular or plural...then better to go with the case given in the question itself....
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gmat740
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PostFri Jul 03, 2009 7:42 pm Reply with quote
http://www.beatthegmat.com/roger-penrose-t39210.html#162353

please take out little time to search the question, that will save your precious time(especially if you are heading for your GMAT soon!)
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real2008
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PostTue Jul 07, 2009 12:27 am Reply with quote
any further opinion please? OA is A
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gmat_dest
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PostTue Jul 07, 2009 12:36 am Reply with quote
Well, the choices are between A and B.

In B, "what is called X tiles" is wrong. "The work...describes" is correct.

A is correct in terms of grammar and also preserves the meaning.
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