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:

Their business is now on its last legs.

A About to fructify

B About to perish

C About to produce results

D About to take off

ANS:B - About to perish

No answer description is available.