Consider the following statements regarding the appointment of an ad hoc Judge of the Supreme Court: A. An ad hoc Judge is to be appointed if the quorum of the Supreme Court Judges is insufficient to hold or continue any session of the Court. B. The Chief Justice of India is required to consult the Chief Justice of the concerned High Court before appointing a Judge of that High Court as an ad hoc Judge of the Supreme Court. C. For appointment of an ad hoc Judge, prior consent of the President is not mandatory. D. An ad hoc Judge of the Supreme Court, while attending sittings of the Supreme Court, enjoys all the powers and privileges of a Supreme Court Judge. Which of the above is/are correct? (a) A, B and C only (b) A and B only (c) C and D only (d) A, B and D only