Correct Answer:
Option D - As per Muller-Breslau principle, influence line for any stress function [Reaction, Shear, Moment] at any section may be obtained by removing the restraint in that direction and applying unit displacement in that direction. The deflected shape gives the ILD.
D. As per Muller-Breslau principle, influence line for any stress function [Reaction, Shear, Moment] at any section may be obtained by removing the restraint in that direction and applying unit displacement in that direction. The deflected shape gives the ILD.