In wire ropes which one of the following statements is correct?
(a) Bending stress is directly proportional to the wire diameter and inversely proportional to the sheave diameter
(b) Bothe Fatigue and wear are due to the tensile stress on the wire bending against the sheave
(c) Bending stress is inversely proportional to the wires diameter and directly proportional to sheave diameter
(d) Both fatigue and wear are due to shear stress on the wires bearing against the sheave