This country contains the Mambilla Plateau as well
This country contains the Mambilla Plateau as well as the the western end of the Adamawa Plateau, through which the Benue River flows. Kano is this country's second largest city, and the Bight of Bonny lies to this country's southwest. This country was home to a breakaway country formed by native Igbo people, the Republic of  (*) Biafra. The Gulf of Guinea lies to the southwest of the country, which contains the Niger River delta. Lake Chad lies to the northeast of this country, which borders Benin to the west and Cameroon to the east and whose largest city is Lagos. For ten points, identify this most populous African country whose capital is Abuja.
This country contains the Mambilla Plateau as well as the the western end of the Adamawa Plateau, through which the Benue River flows.
Federal Republic of {Nigeria}