Explanation:

- The retirement age of Supreme Court Judges in India is specified under the Constitution of India.

- Option:1, 60: This is the retirement age for High Court Judges, not applicable to Supreme Court Judges.

- Option:2, 75: No judiciary body in India currently mandates retirement at the age of 75.

- Option:3, 65: This is the correct answer. Supreme Court Judges in India retire at the age of 65 according to Article 124(2) of the Indian Constitution.

- Option:4, 50: This is not applicable; none of the senior judges retire at this age.