The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is
[$$a_0$$ is Bohr radius]

A

$$\frac{h^2}{4 \pi^2 m a_{0}^{2}}$$

B

$$\frac{h^2}{16 \pi^2 m a_{0}^{2}}$$

C

$$\frac{h^2}{32 \pi^2 m a_{0}^{2}}$$

D

$$\frac{h^2}{64 \pi^2 m a_{0}^{2}}$$