The moment of inertia of a solid cylinder of radius a , mass m and height h about an axis parallel to the axis of the cylinder and at distance b from its centre is : [assume b > a ] a, ½ M(a² + 2b²) b. ½ M(a² + b²) c. ½ M(a² + b²) d. ½ M(a²/3 + b²/12)