Option c is the correct answer. The Turkic nobles were behind the dethroning of Raziyya Begum. Razia's increasing assertiveness and her appointment of non-Turkic individuals to important positions created resentment among the Turkic nobles. The relationship between Razia and her trusted Abyssinian slave, Yaqut, was also viewed with suspicion. In 1238-1239, Malik Izudin Kabir Khan Ayaz, the governor of Lahore, rebelled against Razia, which prompted a series of events leading to her downfall. In 1240, Raziya was deposed by her own Turkish guards and replaced by her younger brother, Muizuddin Bahram.