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Expert replies
by anujmalik » Mon Jul 18, 2011 2:31 pm
Unlike lions and tigers, which can be roaring by causing its hyoid bones to vibrate, domestic cats have fixed hyoid bones and are therefore unable to roar.
A) which can be roaring by causing its hyoid bones to vibrate, domestic cats
B) which can roar by causing their hyoid bones to vibrate, domestic cats
C) who can roar by causing their hyoid bones to vibrate, domestic cats differently
D) who can roar by causing its hyoid bones to vibrate, domestic cats
E) of which the hyoid bones vibrate to cause a roar, domestic cats

Answer Later
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Source: — Sentence Correction |

by vineeshp » Mon Jul 18, 2011 5:59 pm
OA B?

X A) which can be roaring by causing its hyoid bones to vibrate, domestic cats - wordy, can be roaring by causing is too long and unnecessary, its must be their since we refer to plural cats and tigers.

B) which can roar by causing their hyoid bones to vibrate, domestic cats
X C) who can roar by causing their hyoid bones to vibrate, domestic cats differently - unnecessary use of differently. Unlike already conveys the difference.
X D) who can roar by causing its hyoid bones to vibrate, domestic cats - its must be their.
X E) of which the hyoid bones vibrate to cause a roar, domestic cats - of which is horribly wrong.
Vineesh,
Just telling you what I know and think. I am not the expert. :)
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by anujmalik » Tue Jul 19, 2011 10:33 am
Your are correct, the OA is B.
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