1. Which is the largest Zoo in India ?

Answer: Zoological Gardens, Alipur, Kolkata

2. Which is the state largest by area in India ?

Answer: Rajasthan

3. Which is longest railway station ?

Answer: Grand Central Terminal, Chicago(USA).

4. Which is Highest Battle field ?

Answer: Siachin Glacier. Mastguru team Salutes to Indian soldiers.

5. Which is highest dam in world ?

Answer:

Jinping-I Dam - 305 m (1,001 ft) in China on Yalong river.
Second Highest is Nurek Dam 300 m (980 ft) Tajikistan on Vakhsh river.

6. Which is longest tributary river of India ?

Answer: Yamuna

7. Which is smallest planet ?

Answer: Mercury