In a hydrogen atom, the electron is at a distance of 4.768 A from the nucleus. The angular momentum of the electron is :

Question

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