Which Vice-President of India served two full terms of five years each in the second half of the twentieth century and later?

The correct answer is B, Shri M. Hamid Ansari. He was Vice-President from 11 August 2007 to 10 August 2017, two consecutive full terms, and is the only person after Dr. S. Radhakrishnan to achieve that. A career diplomat, he had been India envoy in several countries before the office. Option A is wrong because Shri M. Venkaiah Naidu held a single term, from 11 August 2017 to 10 August 2022. Option C is wrong because Shri R. Venkataraman served as Vice-President only from 1984 to 1987, leaving the office when he was elected President. Option D is wrong because Shri K. R. Narayanan was Vice-President from 1992 to 1997, a single term, after which he was elected President of India. A useful way to hold this fact is that only two Vice-Presidents have ever been given a second term by the electoral college, Dr. S. Radhakrishnan at the beginning of the office and Shri M. Hamid Ansari much later, and that every other holder of the office served one term or less.