1. Which is the longest wall in world ?

Answer: Great wall of China

2. Which is the Densest populated State of India ?

Answer: West Bengal

3. Which is the longest Platform ?

Answer:

Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters)

4. Which is the deepest lake of the world ?

Answer: Lake Baikal

5. Which is longest tributary river of India ?

Answer: Yamuna

6. Which Indian state is having longest coastline ?

Answer: Gujrat

7. Which is the biggest museum in the world ?

Answer: British Museum, London