For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. He is a strange fellow. It is very difficult to deal with him; it seems that he has a bee in his bonnet.

• A. to face problems as a result of his senseless actions
• B. an achievement to be proud of
• C. an obsession about something
• D. unreliable and inconsistent way of behaving
• E. peculiar habit of confusing others

Answer: (C)