Which one of the following States does not form border with Bangladesh?

Concept: India shares an international border with Bangladesh across exactly five states — West Bengal, Assam, Meghalaya, Tripura, and Mizoram — which together form the roughly 4,096-km India-Bangladesh boundary recognised by the Ministry of Home Affairs' Border Management Division.

Application: Among the four states listed in the options, Meghalaya, Mizoram, and Tripura are three of those five border states. Manipur is not among them — its only international boundary is with Myanmar, while its domestic boundaries lie with Nagaland, Mizoram, and Assam.

• Meghalaya's southern and western edge, running along the Garo, Khasi, and Jaintia Hills, forms part of the India-Bangladesh boundary (its northern and eastern side instead borders Assam).

• Mizoram's south-western edge along the Chittagong Hill Tracts forms part of the India-Bangladesh boundary.

• Tripura is bounded by Bangladesh on three sides, making its Bangladesh border one of the longest state-wise stretches.

• Manipur's international frontier lies only with Myanmar, so it has no shared border with Bangladesh at all.

Cross-check: Checking against the Ministry of Home Affairs' official list of India-Bangladesh border states — West Bengal, Assam, Meghalaya, Tripura, and Mizoram — Manipur does not appear on it, confirming it as the state without a Bangladesh border.

Hence, Manipur is the state that does not form a border with Bangladesh.