Consider the following statements: (1) Carnot, Ericsson and Stirling cycles are ideal power cycles that are completely reversible
(2) Ericsson cycle is not a practical engine cycle
(3) Stirling cycle is the only practical power cycle among the above
(4) All these cycles have the same thermal efficiency
Which of the above statements are correct?
(a) 1, 2, 3 and 4 (b) 1, 2 and 4 only
(c) 2, 3 and 4 only (d) 1, 2 and 3 only