Concept:The first military coup in Nigeria took place on 15 January 1966.Explanation:Mutinous Nigerian soldiers led by Major Chukwuma Nzeogwu carried out the coup.The coup targeted many senior politicians and army officers.It is therefore historically recorded as the first Nigerian coup.General Aguiyi Ironsi later took power after the coup, but he did not lead it.Answer:A. Major Chukwuma Nzeogu