Which state among the following does NOT have a common border with Bhutan?

The correct answer is Mizoram . Key Points The international border between India and Bhutan covers a total length of approximately 699 km . Four Indian states share a direct land border with the Kingdom of Bhutan : Assam , Arunachal Pradesh , West Bengal , and Sikkim . Assam shares the longest boundary with Bhutan, spanning 267 km . Arunachal Pradesh shares 217 km , West Bengal shares 183 km , and Sikkim shares the shortest stretch of 32 km . Mizoram is located in the southernmost part of Northeast India and shares its international borders with Bangladesh and Myanmar . It does not share any boundary with Bhutan as it is geographically separated by other states like Assam and Tripura . Additional Information Sikkim : It is bordered by Nepal to the west, Tibet (China) to the north and east, and Bhutan to the southeast. West Bengal : This state shares international borders with Bangladesh in the east, Nepal in the north, and Bhutan in the northeast. Assam : Apart from sharing a 267 km border with Bhutan, it also shares an international border with Bangladesh . Security and Treaties : The Sashastra Seema Bal (SSB) is the specialized paramilitary force responsible for guarding the India-Bhutan border. Relations are guided by the Indo-Bhutan Treaty of Peace and Friendship of 1949 , which was updated in 2007 to reflect modern diplomatic needs.