# According to Bohr's theory, which one of the following values of angular momentum of hydrogen atom is not permitted ?

$\begin {array} {1 1} (1)\;\large\frac{1.25h}{\pi} & \quad (2)\;\large\frac{h}{\pi} \\ (3)\;\large\frac{1.5h}{\pi} & \quad (4)\;\large\frac{0.5h}{\pi} \end {array}$