Iz​=Ix​+Iy​ (using perpendicular axis theorem) & I=mk2(K: radius of gyration ) so mKz2​=mKx2​+mKy2​Kz2​=Kx2​+Ky2​ so radius of gyration about axes x,y&z won't be same hense asseration A is not correct reason R is correct statement (property of a rigid body)