Article Detail Which is longest tributary river of India ? Answer: Yamuna Similar Questions : 1. Which is the brightest planet ? Answer: Venus 2. Which is the Largest lake of the world ? Answer: Caspian Sea (371,000 sq km) 3. Which is largest Dam in World ? Answer: Three Gorges (China) 4. Which is the largest Zoo in India ? Answer: Zoological Gardens, Alipur, Kolkata 5. Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) 6. Which is the longest River in the World ? Answer: Nile 7. Which is the longest road in India ? Answer: Grand Trunk Road (2500 Km) Read more from - Longest and Largest