Q. Which of the following African rivers is the longest east-flowing river in Africa and also the largest flowing into the Indian Ocean from Africa? Answer:
Zambezi
Notes:
The Blue Nile is a river originating at Lake Tana in Ethiopia. Along with the White Nile, it is one of the two major tributaries of the Nile.
The Limpopo River rises in South Africa, and flows generally eastwards through Mozambique to the Indian Ocean.
The Zambezi River is the fourth-longest river in Africa, the longest east-flowing river in Africa and the largest flowing into the Indian Ocean from Africa.
The Congo River, formerly also known as the Zaire River, is the second longest river in Africa, shorter only than the Nile, as well as the second largest river in the world by discharge volume, following only the Amazon. It is also the world's deepest recorded river.