Assertion: An excessively thin film appear black in reflected light.
Reason: The film absorbs all the radiations falling on it.

A) Assertion is True, Reason is True, Reason is a correct explanation for Assertion
B) Assertion is True, Reason is True, Reason is not a correct explanation for Assertion
C) Assertion is True Reason is False.
D) Assertion is False, Reason is True.