Four identical rods, each of mass m and length l are joined to form a rigid square frame. The frame lies in the xy plane, with its centre at the origin and the sides parallel to the x and y-axes. Its moment of inertia about
A An axis parallel to the z-axis and passing through a corner is 5/3 ml2
B The z - axis is 1/4 ml2
C The x - axis is 2/3 ml2
D One side is 1/2 ml2
