Correct Answer: (a) The President
Note: Article 124 of the Indian Constitution
(1) There shall be a Supreme Court of India consisting of a Chief Justice of India and until Parliament by law prescribes a larger number, of not more than thirty-three other Judges.
(2) Every Judge of the Supreme Court shall be appointed by the President by warrant under his hand and seal after consultation with such of the Judges of the Supreme Court and of the High Courts in the States as the President may deem necessary for that purpose and shall hold office until he attains the age of sixty-five years. Provided that in the case of appointment of a judge other than the Chief Justice, the Chief Justice of India shall always be consulted :
Provided further that -
(a) A Judge may, by writing under his hand addressed to the President, resign his office.
(b) A Judge may be removed form his office in the manner provided in clause (4).
So, option (a) is the correct answer.