For a heat
pump, the second law of efficiency can be written in the from_______.
ऊष्मा पम्प के लिए, दक्षता का दूसरा नियम _______ में लिखा जा सकता है।
We know that,
First law of
efficiency
For heat pump
:
Second law of
efficiency 
Hence, the
correct option is (C)
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