Q. Who among the following is the longest serving President of India?
Answer: Rajendra Prasad
Notes: Dr. Rajendra Prasad was the first president of independent India and also the longest-serving president, as the only president to serve two or more terms in office. He held the post for a span of 12 years, 107 days from 26 January 1950 to 13 May 1952.

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