Who is the only Judge of the Supreme Court of India to also have been the Vice-President of India ?

The correct choice is: “Justice Mohammad Hidayatullah”

Justice Mohammad Hidayatullah was a Judge of the Supreme Court from 1958 and served as the 11th Chief Justice of India (1968–1970). After retiring he was elected the sixth Vice-President of India and held that office from 1979 to 1984. He is the only person to have held both offices; he also acted as President of India in 1969 (while Chief Justice) and again briefly as Vice-President.

“Justice A. N. Ray”, “Justice Patanjali Sastri” and “Justice P. N. Bhagwati” were all Chief Justices of India, but none of them ever became Vice-President.