Answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. N. D. Tiwari -  Narayan Dutt Tiwari (born 18 October 1925) is an Indian politician affiliated with the Indian National Congress party. He was thrice Chief Minister of Uttar Pradesh (1976–77 1984–85 1988–89) and once Chief Minister of Uttarakhand (2002–2007). In 1986–1987 he served in Prime Minister Rajiv Gandhi's cabinet as Minister for External Affairs.
Answer:
Office Holder