The longest border between any two countries in the world is between :
- (a) Canada and the United States of America ✓ UPSC's answer
- (b) Chile and Argentina
- (c) China and India
- (d) Kazakhstan and Russian Federation
Why the answer is (a)
• The Canada–United States border is the longest international boundary in the world at about 8,890 km, including the 2,475-km Alaska–Yukon/British Columbia section.
• Kazakhstan–Russia is the longest continuous land border (about 7,600 km) but is shorter overall than the Canada–US frontier.
• Chile–Argentina, along the Andes, is about 5,300 km, and China–India (including disputed sections) about 3,500 km.
• Hence option (a).
• The Canada–US line is also called 'the longest undefended border'.
Why the other options are wrong
- (b) Chile and Argentina
- Chile-Argentina is about 5,300 km, shorter than Canada-USA.
- (c) China and India
- China-India is about 3,500 km.
- (d) Kazakhstan and Russian Federation
- Kazakhstan-Russia is the longest continuous border but shorter in total than Canada-USA.
Asked in the GS Paper I of the UPSC Civil Services Preliminary Examination 2024, held on 16 June 2024. Question and answer key: Union Public Service Commission. Explanation: UPSC Answer Check.