Concept:The ad hoc judge provision in the Supreme Court is covered under Article 127 of the Constitution, which allows a High Court judge to temporarily sit in the Supreme Court.
Explanation:When there is a lack of quorum of permanent judges to hold or continue a session of the Supreme Court, the Chief Justice of India can request a High Court judge to attend as an ad hoc judge. Hence, statement 1 is correct.
The request is made with the previous consent of the President, but it is not the President who appoints such a judge. Therefore, statement 2 is incorrect.
Consultation with the Chief Justice of the concerned High Court is mandatory before making this request. Thus, statement 3 is incorrect.
The judge so requested must be qualified for appointment as a Supreme Court judge. Hence, statement 4 is correct.
So only statements 1 and 4 are correct.
Answer:C. 1 and 4 only