Assertion A Moment of inertia of a circular disc of mass $M$ and radius $R$ about $X,\,Y - $ axes (passing <br> through its plane) and $Z - $ axis which is perpendicular to its plane were found to be ${l_x}\,\,,\,\,\,{l_y}$ and ${l_z}$ <br> respectively. The respective radii of gyration about all the three axes will be the same. <br> Reason R A rigid body making rotational motion has fixed mass and shape. <br> In the light of the above statements, choose the most appropriate answer from the options given below.