Option 3 is correct, i.e. Sarvapalli Radhakrishnan. Sarvapalli Radhakrishnan:-
He served as the First Vice President of India.
He became the country's Vice President twice.
Moreover, before his Political Career, he was a professor of Philosophy in notable colleges and served as Vice-Chancellor of Universities like Andhra University & Banaras Hindu University.
Furthermore, his birthday, 5th September, is celebrated as Teacher’s day in India.