Question:

The length of India's border is longest with which one of the following neighbouring countries?

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Order of longest borders (Trick: बचपन - BCPN): Bangladesh, China, Pakistan, Nepal.
Updated On: May 21, 2026
  • Bangladesh
  • China
  • Pakistan
  • Nepal
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The Correct Option is A

Solution and Explanation

Concept: India shares land borders with seven countries. The length of these borders is determined by historical demarcations and geographic terrain.

Step 1:
Comparing Border Lengths.
According to official government data (Ministry of Home Affairs), the lengths of India's international land borders are approximately:
Bangladesh: 4,096.7 km
China: 3,488 km
Pakistan: 3,323 km
Nepal: 1,751 km
Myanmar: 1,643 km
Bhutan: 699 km
Afghanistan: 106 km

Step 2:
Analyzing the Bangladesh Border.
The border with Bangladesh is the longest because it is highly irregular and "zig-zags" across the states of West Bengal, Assam, Meghalaya, Tripura, and Mizoram. It encircles almost the entire country of Bangladesh on three sides.

Step 3:
Conclusion.
With over 4,000 km of shared boundary, Bangladesh represents the longest international land border for India.
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