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64Roger Penrose

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by real2008 » Fri Jul 03, 2009 3:03 am
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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by goelmohit2002 » Fri Jul 03, 2009 1:22 pm
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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by gmat740 » Fri Jul 03, 2009 7:42 pm
https://www.beatthegmat.com/roger-penros ... tml#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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by real2008 » Tue Jul 07, 2009 12:27 am
any further opinion please? OA is A
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by gmat_dest » Tue Jul 07, 2009 12:36 am
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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