: Any reversible path may be substituted by a reversible zigzag path between the same end processes such that the heat transfer during this zigzag path is equal to the heat transfer during original path. What are the

processes involved in the zigzag path?

a$.$ reversible polytropic and isobaric process

b$.$ reversible polytropic and isothermal process

c$.$ reversible adiabatic and isothermal processes

d$.$ none of the above