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Which one of the following is not a line of demarcation between two countries?
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- International Date Line
- MacMahon Line
- Radcliffe Line
- Durand Line
Correct Option: A
The International Date Line (IDL) is an imaginary line on the surface of the Earth from the north to the south pole and demarcates one calendar day from the next. It passes through the middle of the Pacific Ocean, roughly following the 180° longitude but it deviates to pass around some territories and island groups.