Assertion (A): The angle through which a ray of light bends on passing through a prism is called the angle of deviation.
Reason (r) :The peculiar shape of a prism makes the emergent ray bend at an angle to the direction of the incident ray. ​
(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 but R is true​​​