Which of the following statements are correct for multistaging in a reciprocating air compressor?
1. It decreases the volumetric efficiency.
2. The work done can be reduced.
3. A small high-pressure cylinder is required.
4. The size of flywheel is reduced.
Select the correct answer using the codes given below:
a. 1, 2 and 3 b. 2, 3 and 4
c. 1, 3 and 4 d. 1, 2 and 4