Which of the following is not an economic grouping?

The United Nations Organization (UNO) is not an economic grouping. The UNO is an intergovernmental organization established to promote international cooperation and maintain international order. While it may have some economic functions, its main focus is on global peace and security, social progress, and human rights. On the other hand, the International Bank for Reconstructing and Development (IBRD), Lake Chad Basin Commission (LCBC), Niger Basin Commission (NBC), and Mano River Union (MRU) are all economic groupings or organizations that focus on economic development, cooperation, and integration among their member states.