Q. Which country acts as the source of the "Niger River"?
Answer: Guinea
Notes: The Niger River is the principal river of West Africa, extending about 4,180 km. Its source is in the Guinea Highlands in southeastern Guinea. It runs in a crescent through Mali, Niger, on the border with Benin and then through Nigeria, discharging through a massive delta, known as the Niger Delta, into the Gulf of Guinea in the Atlantic Ocean. The Niger is the third-longest river in Africa, exceeded only by the Nile and the Congo River (also known as the Zaire River). Its main tributary is the Benue River.