The C.O.P. of an absorption type refrigerator is given by (where T1 = Temperature at which the working substance receives heat, T2 = Temperature of cooling water, and T3 = Evaporator temperature)

• A. <img src="/_files/images/mechanical-engineering/heat-transfer-refrigeration-and-air-conditioning/420-193-1.png">
• B. <img src="/_files/images/mechanical-engineering/heat-transfer-refrigeration-and-air-conditioning/420-193-2.png">
• C. <img src="/_files/images/mechanical-engineering/heat-transfer-refrigeration-and-air-conditioning/420-193-3.png">
• D. <img src="/_files/images/mechanical-engineering/heat-transfer-refrigeration-and-air-conditioning/420-193-4.png">