Chocked flow through an isentropic nozzle implies:
1. Discharge is maximum
2. Discharge is zero
3. Nozzle exit pressure £ critical pressure
4. Mach number at the throat is unity
Which of the above statements are correct?
(A) 1, 2, 3 and 4 (B) 1, 2 and 3 only
(C) 1, 3 and 4 only (D) 2, 3 and 4 only