Select the most appropriate meaning of the given idiom.
Once in a blue moon

Correct option is C

Option (c) is the correct meaning of the given idiom.
Once in a blue moon: Something that happens very rarely or infrequently. (कभी-कभी / बहुत कम बार)
Example: I go to the cinema once in a blue moon.
3 Similar Idioms:
· Once in a lifetime – Happens very rarely.
· Few and far between – Not frequent.
· Hardly ever – Almost never.