Compare the shear stress of a straight circular cylindrical tube with an outer diameter of 1 inch and an inner diameter of 0.9 inches, determined using equation (3-37), with the values estimated using equation (3-45).

The equations (3-37) and (3-45) are used to estimate the shear stress of a straight circular cylindrical tube.
Equation (3-37) provides a value 7.5% higher than equation (3-45).
The thickness of the thin wall is estimated using equation (3-37).
The equations (3-40) and (3-41) are used to estimate the shear stress of a thin-walled rectangular section.
a) I and II are correct.
b) II and III are correct.
c) III and IV are correct.
d) I and IV are correct.