Article Detail Which is the longest road in India ? Answer: Grand Trunk Road (2500 Km) Similar Questions : 1. Which is smallest planet ? Answer: Mercury 2. Which is the largest Zoo in the World ? Answer: Berlin Zoological Garden (Germany) 3. Which is the largest Mosque in World ? Answer: Masjid al Haram (Saudi Arabia) 4. Which is longest tributary river of India ? Answer: Yamuna 5. Which is longest river in world ? Answer: Nile, Africa 6. Which is the largest desert in India ? Answer: Thar (Rajasthan) 7. Which is the longest wall in world ? Answer: Great wall of China Read more from - Longest and Largest