Assertion : In Young's double slit experiment, interference pattern disappears when one of the slits is closed.
Reason : Interference occurs due to superposition of light waves from two coherent sources.
(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