Article Detail Which is longest tributary river of India ? Answer: Yamuna Similar Questions : 1. Which is smallest planet ? Answer: Mercury 2. Which is Largest forest state of India ? Answer: M.P. 3. Which is Largest railway route in India ? Answer: Dibrugarh in Assam to Kannyakumari in Tamil Nadu. 4. Which is smallest and largest bird ? Answer: Smallest Bird is Humming Bird and Largest bird is Ostrich 5. Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) 6. Which is the longest Platform ? Answer: Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters) 7. Which is Highest Award in India ? Answer: Bharat Ratna Read more from - Longest and Largest