Three point sized bodies each of mass M are fixed at three corners of light triangular frame of side length L. About an axis perpendicular to the plane of frame and passing through centre of frame the moment of inertia of three bodies is

• A

  ML²

• B

  $\frac{3{\mathrm{ML}}^2}{2}$

• C

  $\sqrt{3}{\mathrm{ML}}^2$

• D

  3ML²