Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

They are not beware of all the facts

A are not aware for

B are not aware of

C are not to be aware

D must not to be aware for

E No correction required

ANS:B - are not aware of

No answer description is available.