Concept:The Ogboni cult served as a judicial organ in Yoruba pre-colonial government.Explanation:The Ogboni acted as the third organ of government in the old Oyo Empire.It checked the excessive use of power by the Oyo Mesi, the principal council of chiefs.It also resolved cases and disputes between the Alaafin and the Oyo Mesi.These functions of settling conflicts and checking abuse of power are judicial in nature.Therefore, the Ogboni cult carried out the role of the judiciary in traditional Yoruba administration.Answer:A. The Judiciary