1. Longest rail tunnel in the world ?

Answer: Seikan Tunnel (Japan - 53.9 Km)

2. Which is the largest sea in the world ?

Answer:

Philippine Sea

3. Which is tallest statue in world ?

Answer:

Spring Temple Buddha located in the Zhaocun township of Lushan County, Henan, China

4. Which is the largest Zoo in the World ?

Answer: Berlin Zoological Garden (Germany)

5. Which is longest railway station ?

Answer: Grand Central Terminal, Chicago(USA).

6. Which is the largest Zoo in India ?

Answer: Zoological Gardens, Alipur, Kolkata

7. Which is the Densest populated State of India ?

Answer: West Bengal