The correct answer is option 3, M.H. Ansari. He is the only second Vice-President of India to serve two consecutive terms after S. Radhakrishnan. K.R. Narayanan, option 1, served as the tenth President of India from 1997 to 2002, not as the Vice-President. B.S. Shekhawat, option 2, served as the eleventh Vice-President of India from 2002 to 2007 and did not serve two consecutive terms. Dr. Shankar Dayal Sharma, option 4, served as the ninth President of India from 1992 to 1997, not as the Vice-President. Therefore, the answer is M.H. Ansari, option 3.