Assertion (A) : The refractive index of a prism depends only on the kind of a glass which is made of and the colour of light.
Reason (R) : The refractive index of a prism depends on the refracting angle of a prism and the angle of minimum deviation.
A) Both A and R are true
B) Both A and R are false
C) A is true but R is false
D) A is false but R is true