In question, four alternatives are given for the idiom under in the sentence. Choose the alternative which best expresses the meaning of the underlined idiom.
Mr. Avinash is very nice and friendly, but his brother is very toffee-nosed.

A

A person who is arrogant and cruel

B

A person who thinks he is intelligent and perfect

C

A person who thinks he is of a high social class and looks down on people of lower class

D

A person who never trusts anyone