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. Ali Sadreddine Al-Bayanouni - Ali Sadreddine Al-Bayanouni (Arabic: ) is a Muslim Brotherhood leader in exile in London. He was born in 1938 (age 7576) in Aleppo and brought up in a religious family where his father and grandfather were both well known Muslim scholars. He joined the Muslim Brotherhood while in secondary school in 1954 and went on to graduate with a law degree from the University of Damascus in 1963. He served as a reserve officer in the Syrian Army from 1959 to 1960.
A:
Office Holder