A light rod of length l has two masses $$m_1$$ and $$m_2$$ attatched to its two ends. The moment of inertia of the system about an axis perpendicular to the rod and passing through the center of mass is

A

$$\frac{m_1+m_2}{m_1m_2}l_2$$

B

$$({m_1+m_2})l_2$$

C

$$\sqrt{m_1m_2}l_2$$

D

$$\frac{m_1m_2}{m_1+m_2}l_2$$