The correct option is C Manipur
Manipur does not form border with Bangladesh. Bangladesh and India share a 4,156 km (2,582 mi)-long international border, the fifth-longest land border in the world, including 262 km (163 mi) in Assam, 856 km (532 mi) in Tripura, 180 km (110 mi) in Mizoram, 443 km (275 mi) in Meghalaya, and 2,217 km (1,378 mi) in West Bengal.