Lake Tanganyika: Option d is the correct answer.
Option 1 is incorrect. Lake Tanganyika is located in central Africa. It is one of the deepest and oldest freshwater lakes in the world. Geographically, it lies entirely south of the Equator.
Lake Tonle Sap: Option 2 is incorrect. Lake Tonle Sap is one of the largest freshwater lakes in Cambodia. It is located in the central plains of Cambodia and lies at a latitude of approximately 13° north of the Equator.
Patos Lagoon: Option 3 is incorrect. Patos Lagoon, known locally as Lagoa dos Patos, is a large coastal lagoon in the southern part of Brazil. It is one of the largest lagoons in South America. It lies around 30° south of the Equator.
