A student is required to demonstrate a high level of comprehension of the subject, especially in the social sciences. The word closest in meaning to comprehension is
@Gurdeep Saini well "meaning of a subject" in this context is quite meaningless thus a option is better.
@Gurdeep Saini i was specific to this question
in general you should avoid unless you are sure that a negative wont undermine the rank much :)
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