Explanation:

World War II was a conflict that involved virtually every part of the world during the years 1939–45.

• It ended six years and one day after Germany’s invasion of Poland on 1st September, 1939, sparked the 20th century’s second global conflict.
• The vast majority of those who died were civilians, including 6 million Jews killed in Nazi concentration camps during the Holocaust.

Principal Belligerents:

• Axis powers—Germany, Italy, and Japan.
• Allies—France, Great Britain, the United States, the Soviet Union, and, to a lesser extent, China.
• The Indian Army was the largest volunteer force during WWII, with over 2.5 million (more than 20 lakh) Indians participating.
• These troops fought the Axis powers (Germany, Italy and Japan) as part of the Allies.

Hence only statement 1st is correct.