Correct Option (C)
Lake Victoria is Africa's largest lake by area and the world's second-largest freshwater lake by surface area. It is shared by three East African countries: Tanzania, Uganda, and Kenya. The lake's northern shores form a significant portion of the international boundary between Tanzania and Uganda.
Incorrect Options:
(A) Chad: Lake Chad is located in the Sahel region of West and Central Africa. It is economically significant, providing water to Chad, Cameroon, Niger, and Nigeria. It does not form a boundary between Tanzania and Uganda.
(B) Malawi: Lake Malawi, also known as Lake Nyasa, is one of the African Great Lakes. It is bordered by Malawi, Mozambique, and Tanzania. While Tanzania is a riparian state, Lake Malawi does not share a border with Uganda.
(D) Zambezi: The Zambezi is a major river in Southern Africa, not a lake. It flows through or along the border of six countries: Zambia, Angola, Namibia, Botswana, Zimbabwe, and Mozambique. It does not form a boundary between Tanzania and Uganda.