The relative coefficient of performance is equal to

• A. <img src="/_files/images/mechanical-engineering/heat-transfer-refrigeration-and-air-conditioning/414-125-1.png">
• B. <img src="/_files/images/mechanical-engineering/heat-transfer-refrigeration-and-air-conditioning/414-125-2.png">
• C. Actual C.O.P. x Theoretical C.O.P.
• D. none of these