Moment of inertia of three uniform rods of mass M and length l joined to form an equilateral triangle, about an axis passing through one of its sides.

Question

 

$$\begin {array} {1 1} (a)\;\frac{Ml^2}{12} & \quad (b)\;\frac{2}{3}Ml^2 \\ (c)\;\frac{Ml^2}{6} & \quad  (d)\;3Ml^2 \end {array}$$