Which one of the following Indian States does not have a common international border with Bangladesh ?

India shares a 4,096.7 km international border with Bangladesh, which is the longest land border India shares with any neighbor. This boundary is shared by five Indian states: West Bengal, Assam (also referred to as Asom), Meghalaya, Tripura, and Mizoram [t1][t4]. West Bengal shares the longest segment of this border at approximately 2,216.7 km, while Tripura shares about 856 km and Assam shares 263 km [t4][t7]. Manipur, however, does not share a border with Bangladesh; instead, it shares its international boundary with Myanmar to the east [t1][t8]. Geographically, Manipur is separated from Bangladesh by the Indian states of Mizoram, Tripura, and Assam. Therefore, among the given options, Manipur is the state that does not have a common international border with Bangladesh.

Sources

1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 16: India–Political Aspects > INTERNATIONAL BOUNDARIES OF INDIA > p. 28
2. [2] https://www.orfonline.org/research/integrated-check-posts-on-the-india-bangladesh-border-a-field-survey-and-brief-analysis