Question 17 from UPSC CSE 2024 - Geograph y

Question

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

Accepted Answer

Correct Option: A. Canada and the United States of America

Strategy: The strategy is to identify the country pair globally recognized for having the longest land boundary. This relies on general geographic knowledge, specifically recognizing Canada and the USA as having an exceptionally long and peaceful land border. Other potential pairs would be eliminated due to their shorter border lengths.

Key Info: ## Longest International Land Borders

*   **Canada--United States:** Approximately 8,890 kilometers (5,525 miles). This is the longest international boundary between two countries globally, including mainland and Alaskan borders. It is notable for being largely unfortified and peaceful, traversing forests, mountains, and lakes.
*   **Russia--Kazakhstan:** Approximately 6,846 kilometers, making it the second longest.
*   **Chile--Argentina:** Around 5,308 kilometers, primarily running along the Andes Mountains.
*   **China--India:** Approximately 3,488 kilometers. Also known as the Line of Actual Control in certain stretches, it includes multiple disputed segments like Aksai Chin and Arunachal Pradesh.

*Note:* International borders can be measured by official demarcation and geographical length. Lengths may change due to new treaties or natural alterations to features like river courses.

Answer

Option B: Chile and Argentina

Answer

Option C: China and India

Answer

Option D: Kazakhstan and Russian Federation