In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase. At large

Explanation

The given idiom is ‘at large’. The meaning of the idiom is ‘roaming free’, ‘not confined’ etc. So, the answer is ‘ a criminal escaped or not yet captured’. The idiom representing ‘a very big opportunity’ is ‘a golden opportunity’. ‘To have a big heart’ is an idiom meaning ‘to be kind and generous’ and ‘a big appetite’ is the meaning of the idiom ‘eat like a horse’. So, the meaning is ‘a criminal escaped or not yet captured’.