Assertion : The second postulate of special relativity refers to the velocity of light in vacuum.
Reason : Cerenkov radiation results when particles move through transparent matter at a speed greater than the speed of light in that medium. It does not violate the second postulate of special relativity.
(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 correct explanation of A
(c) A is true but R is false
(d) A and R are false