Q. A metal rod of length 'L' and mass 'm' is pivoted at one end . A thin disk of mass 'M'  and radius 'R' (<L) isattached at its center to the free  end of the rod . Consider two ways the disc is attached :  (case A) The disc is not free to rotate about its center and case B  the disc is free to rotate about its center . The rod - disc system performs SHM in vertical  plane agfter in vertical plane after being released from the same displaced position . Which of the following statements is are true ?   (1)  Restoring torque  in case A  =  Restoring torque in case B  (2)   Restoring torque in case A <  Restoring torque in case B   (3)   Angular frequency for case A >  Angular frequency for case B  (4)   Angular frequency for case A < Angular frequency for case B