Harish rolled a small steel ball at one edge of the glass bowl as shown below. If there is no friction between the surfaces of the ball and the bowl, what will happen to the ball?

• A.  The ball will roll out of the glass bowl near edge 'Q'.
• B.                         It will stop at centre point 'R' after a number of to-and-fro motions.
• C.                         It will keep moving between point 'P' and 'Q' and will never stop.
• D.                         It will not move at all since friction is required for movement.