Choose the incorrect statement from the following S1 : The efficiency of a heat engine can be 1, but the coefficient of performance of a refrigerator can never be infinity S2 : The first law of thermodynamics is basically the principle of conservation of energy S3 : The second law of thermodynamics does not allow several phenomena consistent with the first law S4 : A process, whose sole result is the transfer of heat from a colder object to a hotter object is impossible