Idioms and Phrases - Verbal and Reasoning

In the following questions four alternatives are given for the idiom/phraseitalicised and underlinedin the sentence. Choose the alternative which best expresses the meaning of idiom/phrase.
Q1:

Mohan always keeps himself to himself

A Is too busy

B Is selfish

C Is unsociable

D Does not take sides

ANS:C - Is unsociable

No answer description is available.