Answer: Any Indian State may share a maximum of three international borders. To put it another way, some specific Indian States have a maximum of three neighbours. These three states are West Bengal, Sikkim, and Arunachal Pradesh. Bhutan, China, and Nepal are the nations with which Sikkim has an international border in the east, north, and west.
Bangladesh to the east, Nepal to the north, and Bhutan to the northeast are the nations with whom West Bengal shares an international border. Myanmar to the east, China to the north, and Bhutan to the west makeup the nations that border Arunachal Pradesh internationally.