With reference to Turbo- jet and Rocket engines, consider the following statements:
1. Efficiency of Rocket engines is higher than that of jet engines.
2. Exit velocities of exhaust gases in Rocket engines are much higher than those in jet engines.
3. Stagnation conditions exists at the combustion chamber in Rocket engines
4. Rocket engines are air- breathing engines
Which of these statements are correct?
(a) 1 and 2 (b) 1,3 and 4
(c) 2,3 and 4 (d)1,2 and 3