Explanation:

- Option:1, Pakistan

- The Karakoram Highway, not the Friendship Highway, connects China to Pakistan.

- This highway is known as the world’s highest paved international road.

- Option:2, Myanmar

- China and Myanmar are connected by the Ledo Road but not by any highway named Friendship Highway.

- Option:3, Nepal

- The Friendship Highway is indeed the road that connects China to Nepal.

- It stretches from Lhasa in Tibet to the border town of Zhangmu, connecting to Nepal.

- Option:4, India

- The Nathu La pass allows a road connection, but there is no highway by this name linking India and China.

Correct Answer: Option:3- Nepal