Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): In the analysis of rigid frames, the usual practice is to consider the strain energy due to flexure only.
Reason (R): The strain energies due to axial and shear forces are usually quite small compared to that of flexure.
In the light of the above statements, choose the most appropriate answer from the options given below: