Why are scientists so much interested in 'Europa' - the fourth largest moon of the planet Jupiter?

Options :
  1. It is believed to be the last remain of a planet having collided with Jupiter.
  2. Its atmosphere is very rich in oxygen.
  3. Rocks covering its surface might date from the beginning of the Solar System.
  4. There is a remote possibility that its ice-covered oceans might harbour life.
Answer and Explanation :-

Answer: Option 4


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