Correct option is A
The idiom
"keep it under your hat" means
to keep something secret or confidential. (Hindi: गुप्त रखना)
Explanation:
·
Conclusion I correctly conveys the idiom’s meaning — keeping information secret.
·
Conclusion II (not using it for your own benefit) is irrelevant; secrecy doesn't imply ethical or selfish use.
·
Conclusion III (buy me a hat) is a literal misinterpretation and completely wrong.
Example sentence:
· I’ll tell you the plan, but keep it under your hat until the meeting.
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Related idioms:
· Spill the beans – to reveal a secret.
· Let the cat out of the bag – to disclose something confidential.