25. Which of the following is a statement or a consequence of 2nd law of thermaldynamics?
(A) The efficiency of any heat engine operates between two heatreservoir is less or equal to the Carnot engine.
(B) Heat can never pass froma colder to a warmer body without some other changes occurring at the sametime.
(C)Entropy of an object always increases when it is in contact with aheat reservoir.
(D) Isolated perpetual motion machine is not possible.
(E) Theentropy of a thermal system going through a cyclic process always increasesor stays the same after a full cycle.