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:

It is time that professors came down from their ivory towers and studied the real needs of the students.

A Detachment and seclusion

B A tower made of ivory

C Prison

D Dream lands

ANS:A - Detachment and seclusion

No answer description is available.