The time period of oscillation of a uniform rod with length l pivoted at one end is

Question

$\begin{array}{1 1} 2\pi \sqrt {\large\frac{l}{2g}} \\ 2\pi \sqrt {\large\frac{l}{g}} \\ 2\pi \sqrt {\large\frac{2l}{3g}} \\2\pi \sqrt {\large\frac{l}{3g}} \end{array} $