Select the most appropriate meaning of the given idiom:

Mum’s the word

Correct option is C

The idiom "Mum's the word" means "to keep silent or not reveal a secret."
· This phrase is used when someone is asked to not disclose certain information.
· Example: I’ll tell you what happened, but mum’s the word, okay?
Information Booster
1. Origin: From Middle English mum, meaning silent or quiet.
2. Popular Usage: Common in secretive contexts, often in conversations about surprises or confidential matters.
3. Related phrases: “Keep it under wraps”, “My lips are sealed”.
4. Examples: She knows about the plan but promised that mum’s the word.