Why does Carnot cycle has maximum efficiency?

Why does Carnot cycle has maximum efficiency? Correct Answer Since all the processes in Carnot cycle are completely reversible

All the processes in Carnot cycle are completely reversible.

Related Questions

If Carnot cycle has maximum possible thermal efficiency, then why don’t the steam turbine power plants run on Carnot cycle?
The efficiency of Carnot cycle is ____ the efficiency of Rankine cycle.