Option 1 -> Tripura, Manipur, and Mizoram do not share borders with Bhutan, while Arunachal Pradesh does.
Option 2 -> Incorrect because Arunachal Pradesh shares a border with Bhutan.
Option 3 -> Incorrect because Arunachal Pradesh shares a border with Bhutan.
Option 4 -> Incorrect because Arunachal Pradesh shares a border with Bhutan.
Hence, Option 1: (A), (B) and (C) only -> Bhutan shares its border with only four Indian states: Sikkim, West Bengal, Assam, and Arunachal Pradesh. Among the states listed in the question, only Arunachal Pradesh shares a border with Bhutan, while Tripura, Manipur, and Mizoram (all northeastern states) do not have any international boundary with Bhutan -> correct