Answer:
Correct answers are:
1. China
2. India
3. Vietnam
5. North Korea
6. South Korea.
Explanation:
As we can see from the map China is the largest country in Asia, located in central Asia (no 1).
India is located in the south, on the Indian subcontinent (no 2).
Vietnam is located in the southeastern part of Asia (no 3), while North and South Korea are located in the eastern part of the continent (no 5 and 6).
