A rocket can go vertically upwards in earth's atmosphere because

Options :
  1. of the force exerted on the rocket by gases ejected by it
  2. it is lighter than air
  3. both are right
  4. none of the above
Answer and Explanation :-

Answer: Option 1

Explanation:

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Wherever there is danger, there lurks opportunity wherever there is opportunity, there lurks danger. The two are inseparable.
-Earl Nightingale