The correct answer is (d). Mizoram does not have a common border with Myanmar.
Assam, Nagaland, and Arunachal Pradesh all share borders with Myanmar. Assam is located in the northeastern part of India and shares a border with Myanmar to the east. Nagaland is located to the north of Assam and also shares a border with Myanmar. Arunachal Pradesh is located to the north of Nagaland and shares the longest border with Myanmar of any Indian state.
Mizoram is located in the far southeastern part of India and is surrounded by Bangladesh to the west, Tripura to the northwest, Assam to the north, and Manipur to the east. It does not share a border with Myanmar.