Select the most appropriate meaning of the given idiom.
Once in a blue moon
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 3 i.e. Very rarely.
Idioms: A group of words established by usage as having a meaning not deducible from those of the individual words.
"Once in a blue moon" means very rarely.
Example: Once in a blue moon I go to the cinema.