In a plastic analysis of structures, the segment between any two successive plastic hinges is assumed to deform as :-A-A plastic materialB-A rigid materialC-An elastic materialD-An inelastic material-B-A rigid material

B A rigid material (b) is correct The initial slopes and deflections of the beam do not affect the virtual work equations. Thus the displacement diagram can be simplified to consists of straight and un deflected lines i.e. rigid deformation.