Which of the following group of countries are members of the Niger Basin Commission?

The correct answer is "The republic of Guinea, Burkina Faso and Nigeria." The Niger Basin Commission is an intergovernmental organization that was created to promote cooperation among member countries in the management of shared water resources in the Niger River Basin. The member countries of the commission include countries that share the Niger River Basin. Therefore, the correct option is the one that lists countries that share the Niger River Basin and are members of the commission. Among the options provided, only the Republic of Guinea, Burkina Faso, and Nigeria are countries that share the Niger River Basin and are members of the Niger Basin Commission.