Choose the correct statements.   a. The equilibrium state is the macrostate with the smallest number of microstates.   b. The equilibrium state is the macrostate with the largest number of microstates.    c. The equilibrium state of an isolated system has minimum entropy.   d. The equilibrium state of an isolated system has maximum entropy.   e. Isolated systems always have maximum entropy.

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A: Entropy change is the measure of change in thermal energy per unit temperature of the system.

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