Vapour compression refrigeration is somewhat like

Solution (By Examveda Team)

Option A: Carnot cycle
The Carnot cycle is an ideal thermodynamic cycle that gives the maximum possible efficiency. It consists of two isothermal and two adiabatic processes. It is used only as a standard of comparison and cannot be practically implemented because isothermal compression and expansion are very difficult to achieve.

Option B: Reversed Rankine cycle
The vapour compression refrigeration system follows the processes of compression, condensation, expansion (throttling), and evaporation. These are the exact processes of the Reversed Rankine cycle. It is a practical and achievable cycle, which is why almost all refrigerators and air conditioners work on this principle.

Option C: Reversed Carnot cycle
The Reversed Carnot cycle is the theoretical model of refrigeration with the highest possible COP (Coefficient of Performance). However, it cannot be applied in real systems because achieving isothermal heat addition and rejection along with isentropic compression/expansion is practically impossible. So, it serves as an "ideal reference" but not the real working cycle.

Conclusion:
While the Reversed Carnot cycle is the ideal and most efficient refrigeration cycle, it is not feasible for practical use. The Vapour Compression Refrigeration system actually works on the Reversed Rankine cycle, which is why the correct answer is Option B: Reversed Rankine cycle.