Answer:
Light can pass through Object B faster than it can pass through Object A.
Explanation:
When light enters in the medium denser than air it bends towards the normal. Thus, if light enters in the medium with higher refracting index it slows down.
So, when light can pass through object B faster than that of object A as object A has higher refracting index than object B.
Speed of light is inversely proportional to the optical density. Optical density is directly proportional to refracting index. So, for higher optical density refracting index is higher and the speed of light is less.
Hence, optical density of object A is higher than that of object B.