The correct answer is option 1, Dr. S. Radhakrishnan. He served as the Vice-President of India for two consecutive terms. Dr. S. Radhakrishnan was a renowned philosopher, scholar, and statesman. He held the office of the Vice-President from 1952 to 1962. After completing his first term, he was re-elected and continued to serve as the Vice-President for another term. It is worth noting that Dr. S. Radhakrishnan`s contribution to education and philosophy was immense, and he was honored with the Bharat Ratna, the highest civilian award in India, in 1954.