Assertion: When white light passes through a glass prism, red color gets deviated the least.
Reason: This is because red light has minimum speed in the prism.

A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true.