Explanation:

Being Guardian of Constitution, the judiciary has to be independent — insulated from pressures and inducements. This independence of the judiciary is ensured by many constitutional provisions. For example: Judges do not hold their offices at the “pleasure” of the President. In other words, they cannot be arbitrarily removed by the government once they are appointed, and can only be impeached by a special majority of both houses (Article 124(4)) of Parliament only “on the ground of proved misbehaviour or incapacity”. Hence option 3rd is correct.