Which one of the following criteria is not required to be qualified for appointment as Judge of the Supreme Court?

According to Article 124(3) of the Constitution of India, a person must be a citizen of India to be qualified for appointment as a Judge of the Supreme Court. The specific eligibility criteria include: (a) having served as a Judge of a High Court (or two or more such courts in succession) for at least five years; (b) having been an advocate of a High Court for at least ten years; or (c) being a distinguished jurist in the opinion of the President. There is no provision in the Constitution that mentions service as a Sub-Judicial Magistrate, regardless of the duration, as a qualifying criterion for the Supreme Court. While the subordinate judiciary is part of the judicial structure, its members must first be elevated to a High Court and meet the five-year tenure requirement there to become eligible for the apex court.