Please 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. Armen Garo - Karekin Pastermadjian (Armenian: ) better known by his nom de guerre Armen Garo was one of the distinguished leaders of the Armenian Revolutionary Federation and the first ambassador to the United States from an independent Armenia.
A:
Office Holder