I see him once in a blue moon.

A I see him every full moon night.

B I see him rarely.

C I see him when the moon sets.

D I see him at mid night.

Correct Answer: Option B

Once in a blue moon phrase টির অর্থ হলো কদাচিৎ (rarely)। সুতরাং সঠিক উত্তর I see him rarely