17. Moment of inertia (M.I) of four bodies, having same mass and radius, and reported as:
I1 = M.I. of thin circular ring about its diameter

18. 12 = M.I. of circular disc about an axis perpendicular to disc and going through the centre, 13 = M.I. of solid cylinder about its axis and 14 = M.I. of solid sphere about its diameter. (a) 1+3