JEE Main Physics question

A gramophone disc is set revolving in a horizontal plane and reaches a steady state of motion of two revolutions per second. It is found that a small coin placed on the disc will remain there if its centre is not more than 5 cm from the axis of rotation. The coefficient of friction between the coin and the disc is

• (A)0.2
• (B)0.4
• (C)0.6
• (D)0.8Correct