The second law of thermodynamics deals with the transfer of a. only...

The second law of thermodynamics establishes the direction of heat transfer and the limitations on converting heat into work. It states that heat cannot spontaneously flow from a colder body to a hotter body without external work being done. It also implies that it is impossible to construct an engine operating in a cycle that completely converts heat from a single reservoir into an equivalent amount of work.

Thus, the second law of thermodynamics primarily deals with the transfer of heat.

Answer: c