1. Which is Highest Battle field ?

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

2. Which is longest river of India

Answer: Ganges

3. Which is largest Dam in World ?

Answer: Three Gorges (China)

4. Which is longest tributary river of India ?

Answer: Yamuna

5. Which is Largest library in the world ?

Answer: United State Library of Congress, Washington D.C.

6. Which is Largest forest state of India ?

Answer: M.P.

7. 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.