Detailed Solution:
The correct answer is “on an address from both Houses of Parliament”.
The Comptroller and Auditor General (CAG) is appointed by the President, and he can be removed: (2) on an address from both Houses of Parliament
The procedure for the removal of the CAG is similar to that of a Supreme Court judge, which requires an address by both Houses of Parliament.
A judge of the Supreme Court shall not be removed from his office except by an order of the President passed after an address by each House of Parliament supported by a majority of the total membership of that House and by a majority of not less than two-thirds of the members of that House present and voting has been presented to the president in same session for such removal on the ground of proved misbehaviour or incapacity.