The longest border between any two countries in the world is between :
- ACanada and the United States of AmericaCorrect
- BChile and Argentina
- CChina and India
- DKazakhstan and Russian Federation
Explanation
The correct answer is A) Canada and the United States of America.
The border between Canada and the United States is the longest international border in the world, stretching approximately 8,891 kilometers (5,525 miles), including about 2,475 kilometers (1,538 miles) with Alaska.
Let's compare with other options:
- Chile and Argentina: Share a very long border along the Andes, but it's not the world's longest. Approximately 5,300 km (3,300 miles).
- China and India: Their shared border (Line of Actual Control) is about 3,488 km (2,167 miles), shorter than the Canada-US border.
- Kazakhstan and Russian Federation: Share a long border in Central Asia, approximately 7,644 km (4,750 miles), which is the second-longest continuous land border in the world, but still shorter than the Canada-US border (which includes water boundaries).
Therefore, Canada and the United States of America share the longest border.
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