The moment of inertia of an equilateral triangular plate about the axis passing through its centre of mass and lying in the plane is . The moment of inertia of a hexagonal plate of side 'a' and made of same material and same thickness, about an axis passing through the centre of mass and lying in its plane will be :
(A) 6I
(B) 10I
(C) 24I
(D) 30I
