Which of the following statements are correct with respect to regenerative feed heating in a steam cycle?
1. It increases cycle efficiency
2. It increases specific output
3. It reduces the condenser load
4. It improves the steam quality at the end of expansion
(a) 1 and 3 only (b) 2 and 4 only
(c) 2 and 3 only (d) 1,2,3 and 4