Article Detail Which is longest tributary river of India ? Answer: Yamuna Similar Questions : 1. Which is Longest national highway of India ? Answer: NH-7 ( Varanasi to Kanyakumari - 2,369 km) 2. What is the name of tallest Animal ? Answer: Giraffe 3. Which state is largest by Population ? Answer: Uttar Pradesh 4. Which is the deepest lake of the world ? Answer: Lake Baikal 5. Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) 6. Which is Highest Award in India ? Answer: Bharat Ratna 7. Which is the longest Platform ? Answer: Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters) Read more from - Longest and Largest