In combined bending and torsion equivalent bending moment is
a. Me = (M^2 + T^2)^1/2
b. Me = ½(M^2 + T^2)^1/2
c. Me = M+(M^2 + T^2)^1/2
d. Me = 1/2 [M+(M^2 + T^2)^1/2]
a. Me = (M^2 + T^2)^1/2
b. Me = ½(M^2 + T^2)^1/2
c. Me = M+(M^2 + T^2)^1/2
d. Me = 1/2 [M+(M^2 + T^2)^1/2]