Which one among the following rivers is the longest?

Correct Option

The Amazon River is approximately 6,400 km long. It originates in the Andes Mountains of Peru and flows eastward across South America before emptying into the Atlantic Ocean. While the Nile River has historically been considered the longest, recent hydrological assessments suggest the Amazon may marginally exceed the Nile in length, depending on the precise definition of the source and mouth. Among the given options, the Amazon is the longest.

Incorrect Options

• Amur River: This river is approximately 4,444 km long. It forms a significant portion of the border between Russia and China.
• Congo River: With an approximate length of 4,700 km, the Congo River is the deepest river in the world and the second longest in Africa, after the Nile.
• Lena River: The Lena River is approximately 4,400 km long. It is one of the longest rivers in Siberia, Russia, flowing into the Arctic Ocean.