Article Detail Which is Highest Battle field ? Answer: Siachin Glacier. Mastguru team Salutes to Indian soldiers. Similar Questions : 1. Which is the smallest state of India by Population ? Answer: Sikkim 2. Which is the lightest gas ? Answer: Hydrogen 3. Which is the longest road in India ? Answer: Grand Trunk Road (2500 Km) 4. Which is smallest planet ? Answer: Mercury 5. What is the name of brightest star ? Answer: Sirius 6. Which is the lightest metal ? Answer: Lithium 7. Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) Read more from - Longest and Largest