Q. Sun’s halo is produced by the refraction of light in which of the following situations?
Answer: Ice crystals in Cirrus clouds
Notes: Sun's halo is produced by the refraction of light in Ice crystals in Cirrus clouds. A halo is a ring or light that forms around the sun or moon as the sun or moon light refracts off ice crystals present in a thin veil of cirrus clouds.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 64 in Climatology - Atmosphere, Winds, Humidity, Clouds, Rainfall in above course in App.