If uncertainty in position and momentum are equal, then uncertainity in velocity is

Question

$\begin{array}{1 1} (a)\;\large\frac{1}{2m} \sqrt {\large\frac{h}{\pi}} \\(b)\;\sqrt {\large\frac{h}{2 \pi}} \\ (c)\;\large\frac{1}{m} \sqrt {\large\frac{h}{\pi}} \\ (d)\; \sqrt{\large\frac{h}{\pi}} \end{array} $