Q. Identify the river based on the following statements:

1. It ranks as the world's tenth longest river.
2. It serves as a border between China and Russia.
3. In Chinese, it is known as Heilong Jiang.

Select the correct answer from the options given below:
Answer: Amur
Notes: The Amur River forms a significant part of the border between China and Russia, is about 2,824 km long—making it the world's tenth longest river—and is called Heilong Jiang ("Black Dragon River") in Chinese. The Yenisei and Lena are entirely within Russia, while Neva is located in northwest Russia only.