To which of the following did Nigeria belong before the formation of the OAU

Before the formation of the Organization of African Unity (OAU) in 1963, Nigeria belonged to the Monrovia Group. The Monrovia Group was a coalition of African countries that favored a more gradual approach to African unity and independence, as opposed to the more radical and immediate approach of the Casablanca Group. The Monrovia Group was formed in 1961 and included countries such as Liberia, Senegal, Guinea, Ivory Coast, and Nigeria. The group was named after Monrovia, the capital city of Liberia, where the first meeting was held. The Monrovia Group played a significant role in shaping the early history of African unity and cooperation.