Which is the longest tributary river in the world?

Q. Which is the longest tributary river in the world?
Answer: Irtysh River
Notes: The Irtysh River is the longest tributary river in the world. It flows through Russia, China and Kazakhstan. It is the chief tributary of the Ob River.

This Question is Also Available in:

हिन्दी

Question Source: 📚This question has been sourced from GKToday's "40000+ GK / General Studies MCQs for SSC & State PCS Exams" App Exclusive Course in GKToday Android Application which provides more than 40K General Knowledge and General Studies questions with explanations asked in all Competitive Exams of India. Download the app here.

📌 Question Number: 37 in Physical Geography - Important Rivers, River Islands, Deltas and Lakes in the above course in App.