Who was not a chief justice of India?

The correct answer is Justice H.R. Khanna.

Step-by-Step Explanation:

1. Justice M. Patanjali Sastri: He served as the 2nd Chief Justice of India from November 1951 to January 1954.

2. Justice K.N. Wanchoo: He served as the 10th Chief Justice of India from April 1967 to February 1968.

3. Justice M.N. Venkatachaliah: He served as the 25th Chief Justice of India from February 1993 to October 1994.

4. Justice H.R. Khanna (Hans Raj Khanna): He was a landmark Judge of the Supreme Court of India known for his historic dissenting judgment in the ADM Jabalpur v. Shivkant Shukla case (Habeas Corpus case) during the Emergency. Despite being the senior-most judge after Chief Justice A.N. Ray, he was superseded by the government when Justice M.H. Beg was appointed as Chief Justice of India in 1977. As a result, Justice H.R. Khanna resigned and was never appointed as the Chief Justice of India.