Assertion : To hear distinct beats, difference in frequencies of two sources should be less than `10`.
Reason : More the number of beats per sec more difficult to hear them.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but re ason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false