The Bell Coleman cycle (also called as the Jouleor reverse Brayton cycle) is a refrigerator cycle. Where the working fluid is a gas that is compressed and expanded, but does not change phase. Air is most often this working fluid. As these is no condensation and evaporation intended in this gas cycle.

Bell Coleman consist of four process as show in figure

Where,

Process 1 – 2 :isentropic compression

Process 2 – 3 :constant pressure heat rejection

Process 3 – 4 :isentropic expansion

Process 4 – 1 :constant pressure absorption

Hence, the correct option is (C).