Moment of inertia of a two-particle system

2016 Phase II 1 question

1. 1 System of Particles and Rotational Motion
   A light rod of length l has two masses $m_1$ and $m_2$ attached to its two ends. The moment of inertia of the system about an axis perpendicular to the rod and passing through the centre of mass is:
   A $(m_1 + m_2)l^2$ B $\sqrt{m_1m_2}\,l^2$ C $\frac{m_1m_2}{m_1 + m_2}l^2$ D $\frac{m_1 + m_2}{m_1m_2}l^2$
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