'Let the cat out of the bag' means
AFree a captured stray cat
BReveal a secret unknowingly
CBuy a pet cat from store
DThrow an old bag away
Answer & Solution
Correct answer: B. Reveal a secret unknowingly
1. Idiom for revealing a secret.
2. Letting the cat out = spilling info.
3. Synonymous with 'spill the beans'.
4. Hence option A.
_Source: jkchrome.com SSC Idioms and Phrases PDF (Mistral OCR), section on common idioms_