What is the coefficient of performance of the refrigerant system working on reversed Carnot cycle, having Qa as heat absorbed by the air during isothermal expansion per kg of air and Qr as heat rejected during isothermal compression per kg of air?a) COP=\(\frac{Q_a}{(Q_r – Q_a)}\) b) COP=\(\frac{Q_r}{(Q_r – Q_a)}\) c) COP=\(\frac{Q_a}{(Q_r + Q_

• A. COP=\(\frac{Q_a}{(Q_r – Q_a)}\)
• B. COP=\(\frac{Q_r}{(Q_r – Q_a)}\)
• C. COP=\(\frac{Q_a}{(Q_r + Q_a)}\)
• D. COP=\(\frac{Q_a}{(Q_a – Q_r)}\)