Q. The shear stress at a point in a shaft subjected to a torque is

• (A) Directly proportional to the polar moment of inertia and to the distance of the point from the axis
• (B) Directly proportional to the applied torque and inversely proportional to the polar moment of inertia
• (C) Directly proportional to the applied torque and the polar moment of inertia
• (D) Inversely proportional to the applied torque and the polar moment of inertia