Which of the following is not a member of ECOWAS?

Cameroun is not a member of ECOWAS. ECOWAS stands for Economic Community of West African States, and it is a regional intergovernmental organization that was established to promote economic cooperation and integration among its member states in West Africa. Although Cameroun is located in West Africa, it is not a member of ECOWAS. Instead, Cameroun is a member of the Central African Economic and Monetary Community (CEMAC), which is a regional organization that promotes economic integration and cooperation among its member states in Central Africa. In summary, Nigeria, Ghana, and Liberia are members of ECOWAS, while Cameroun is not a member of this organization.