Consider the following statements regarding a reciprocating air compressor:
1. The effect of clearance is to reduce the volumetric efficiency
2. The clearance has no effect on work done per kg of air delivered
3. The volumetric efficiency decreases with increasing pressure ratio
Which of the above statements is/are correct?
(A) 1, 2 and 3 (B) 1 and 2 only
(C) 2 and 3 only (D) 3 only