Assertion :The frequencies of incident, reflected and refracted beam of monochromatic light at the interface of two media are same. Reason: The incident, reflected, refracted rays are coplanar.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true and reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.