Which river is traditionally cited as the longest river in the world?

• A. Amazon
• B. Yangtze
• C. Mississippi
• D. Nile

Answer: (D)

Long river length depends on where the river starts (the most distant source) and where it ends (the mouth). Because sources and measurement methods can be debated, rankings can shift. Traditionally, the Nile has been cited as the longest river in the world, with assessments around 6,650 kilometers, spanning from East Africa to the Mediterranean. This traditional view appeared in many old maps and textbooks, so it’s the answer that aligns with that commonly taught perspective. In recent years, some measurements of the Amazon have challenged this, suggesting it could be comparable to or longer than the Nile depending on how sources are defined, but the phrasing here points to the older, traditional claim.