Consider the following statements about two-stage reciprocating compressors:
(1) For the same pressure ratio the volumetric efficiency of a two-stage compressor is more than that of single stage compressor.
(2) A two-stage compressor requires minimum work when inter-cooling is perfect.
(3) The intercooler pressure p2 is the average of inlet pressure p1 and delivery pressure p3.
Which of the above statements are correct?
(A) 1 and 3 only (B) 1 and 2 only
(C) 2 and 3 only (D) 1, 2 and 3