Which of the following state shares boundary with Nepal?

All of the above

The correct answer is Option (4) - All of the above

All of the above states - Bihar, Uttarakhand, and Uttar Pradesh - share a boundary with Nepal.

Bihar, Uttar Pradesh, Uttarakhand: These states in northern India share a border with Nepal. They are part of the historical and cultural region known as the Terai.

Bihar: Shares a border with Nepal along its northern part.

Uttar Pradesh: Has a southwestern border with Nepal.

Uttarakhand: Borders Nepal along its southern region.