Role of the Communist Party in India

Q. Why did the communists in India decide to support British in the Second World War?

1. They were alarmed by the attack of the US on Germany.
2. They were alarmed by the attack on Germany by the Soviet Union.
3. They did not want British to quit India.
4. They were alarmed by the attack on the Soviet Union by the Nazis.

Q.

why U.S involved in indo china war ?