The thrust of rocket engine depends upon

Question

 Consider the following statements:

The thrust of rocket engine depends upon

1. Effective jet velocity. 
2. Weight of the rocket.
3. Rate of propellant consumption

Which of these statements are correct?

(a)1 and 2                    (b)1 and 3

(c) 2 and 3                   (d)1,2 and 3