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:

Although he has failed in the written examination, he is using backstairs influence to get the job.

A Political influence

B Backing influence

C Deserving and proper influence

D Secret and unfair influence

ANS:D - Secret and unfair influence

No answer description is available.