Assertion: The time period of a pendulum is given by the formula, \[T=2\pi \sqrt{g/l}\]. Reason: According to the principle of homogeneity of dimensions, only that formula is correct in which the dimensions of L.H.S. is equal to dimensions of R.H.S.

• 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 reason 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.
• E.     If assertion is false but reason is true.