Which of the following states share a boundary with Bhutan?

West Bengal, Sikkim, Arunachal Pradesh and Assam

The correct answer is Option (3) - West Bengal, Sikkim, Arunachal Pradesh and Assam

The states that share a boundary with Bhutan are West Bengal, Sikkim, Arunachal Pradesh and Assam.

West Bengal: Shares a northeastern border with Bhutan.

Sikkim: Borders Bhutan to the east.

Arunachal Pradesh: Borders Bhutan to the west.

Assam: Has a western border with Bhutan.