Correct option is D
The correct idiom is (d) Mum’s the word.
Explanation:
- Mum’s the word means “keep silent” or “do not reveal anything.” It is used to instruct someone to keep a matter secret. (Hindi meaning: चुप रहो / कुछ मत कहना)
- Example: This is confidential information, so mum’s the word.
Meanings of other options:
- (a) Hit below the belt: to act unfairly or say something cruel. (Hindi meaning: अनुचित तरीके से वार करना)
- (b) Hush money: money paid to keep someone silent about something. (Hindi meaning: चुप कराने के लिए रिश्वत)
- (c) Hit the sack: to go to bed. (Hindi meaning: सोने जाना)
So the correct answer is (d)