What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.) ?

A. TR/(T2 TR) (T1 T2)/T1

B. TR/(T2 TR) T1/(T1 T2)

C. None of these

D. TR/(T1 TR) (T1 T2)/T1

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