A cylinder and a ring of same mass M and radius R are placed on the top of a rough inclined plane of inclination `theta`. Both are released simultaneously from the same height h:
Answer the following question based on above passage:
Choose the correct statement (s) related to the motion of each body

Options

A. The friction force acting on each body opposes the motion of its centre of mass
B. The friction force provides the necessary torque to rotate the body about its centre of mass
C. Without friction none of the two bodies can roll
D. The friction force ensures that the point of contact must remain stationary

Answer

A, B, C