Two shafts A and B are same material, and A is twice the diameter of B, the torque that can be transmitted by A is

Two shafts A and B are same material, and A is twice the diameter of B

1.	Two shafts A and B are same material, and A is twice the diameter of B, the torque that can be transmitted by A is
A.	2 times that of B
B.	8 times that of B
C.	4 times that of B
D.	6 times that of B
Answer» C. 4 times that of B