Which Chief Justice of India also served as Vice-President and Acting President?

Q. Which Chief Justice of India also served as Vice-President and Acting President?
Answer: Mohammad Hidayatullah
Notes: Mohammad Hidayatullah was Chief Justice of India (1968-1970), Vice-President (1979-1984), and also served as Acting President in 1969 and 1982. He uniquely held all these positions; no other Chief Justice has served in both top judicial and executive offices of India.