Which one among the following Indian States shares international boundaries with three nations?

Arunachal Pradesh is the Indian state that shares international boundaries with three nations: Bhutan to the west, China to the north, and Myanmar to the east [3]. According to official data, Arunachal Pradesh shares a 3,488 km border with China (Tibet), a 699 km border with Bhutan, and a 1,643 km border with Myanmar [3]. Other states sharing borders with three countries include Sikkim (Nepal, Bhutan, China) and West Bengal (Nepal, Bhutan, Bangladesh). In contrast, Uttarakhand shares borders with only two nations, China and Nepal [3]. Himachal Pradesh shares a border only with China [1]. Assam shares international boundaries with two nations, Bhutan and Bangladesh [3]. Therefore, among the given options, Arunachal Pradesh is the only state meeting the criteria of bordering three different nations.

Sources

1. [3] https://www.mha.gov.in/sites/default/files/BMdiv_I_Annexure_I_12032021.pdf
2. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 16: India–Political Aspects > The Sino-Indian Border Dispute > p. 29