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:

The arrival of the mother-in-law in the family proved a rift in the lute.

A caused unnecessary worries

B brought about disharmony

C caused a pleasant atmosphere

D brought about a disciplined atmosphere

ANS:B - brought about disharmony

No answer description is available.