The longest border between any two countries in the world is between:

The longest border between any two countries in the world is between:
  1. Canada and the United States of America
  2. Chile and Argentina
  3. China and India
  4. Kazakhstan and Russian Federation

Solution

The Canada-USA border, at about 8,891 km (including Alaska), is the longest international border in the world between any two countries.

Asked in: UPSC Prelims 2024

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