Assertion (A): A hollow shaft will transmit a greater torque than a solid shaft of the same weight and same material
Reason (R): The average shear stress in the hollow shaft is smaller than the average shear stress in the solid shaft
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOTthe correct explanation of A
(c) A is true but R is false
(d) A is false but R is true