Choose the phrasal verb which means "to become silent"Aget overBClam upCmake outDturn downAnswer: B. Clam up Read Explanation: Clam up :- Refuse to speak, to become silent.(പെട്ടെന്ന് സംഭാഷണം നിറുത്തുക.) eg: She clammed up whenever I mentioned her husband.Read more in App