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.