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

Explanation:

1. Canada-USA border:

– Length: Approximately 8,891 kilometers (5,525 miles)
– Also known as the International Boundary
– Includes both land and water boundaries
– Stretches from the Pacific Ocean in the west to the Atlantic Ocean in the east

2. Kazakhstan-Russia border:

– Second longest international border
– Length: Approximately 7,644 kilometers (4,750 miles)

3. Chile-Argentina border:

– Third longest international border
– Length: Approximately 5,308 kilometers (3,298 miles)
– Runs along the Andes Mountains

4. China-India border:

– Not among the top longest borders
– Length: Approximately 3,488 kilometers (2,167 miles)
– Also known as the Line of Actual Control (LAC) in some disputed areas

The Canada-USA border is notable not only for its length but also for being the world’s longest undefended international boundary, reflecting the long-standing peaceful relationship between the two countries.