In 1971 who was appointed as the Chief Justice of India?

A. N. Ray

The correct answer is Option 4 - A. N. Ray 

As far as the appointment of the Chief Justice of India (CJI) is concerned, over the years, a convention had developed whereby the senior-most judge of the Supreme Court was appointed as the Chief Justice of India. This convention was however broken twice. In 1973 A. N. Ray was appointed as CJI superseding three senior Judges. Again, Justice M.H. Beg was appointed superseding Justice H.R. Khanna (1975).