The correct answer is: A. a-1, b-4, c-2, d-3

Kinnaur shares a boundary with Tibet. Bilaspur shares a boundary with Uttar Pradesh. Chamba shares a boundary with Jammu and Kashmir. Sirmaur shares a boundary with Punjab.

Here is a brief explanation of each option:

  • Option A: This option is correct. Kinnaur shares a boundary with Tibet. Bilaspur shares a boundary with Uttar Pradesh. Chamba shares a boundary with Jammu and Kashmir. Sirmaur shares a boundary with Punjab.
  • Option B: This option is incorrect. Bilaspur does not share a boundary with Jammu and Kashmir.
  • Option C: This option is incorrect. Chamba does not share a boundary with Tibet.
  • Option D: This option is incorrect. Sirmaur does not share a boundary with Uttar Pradesh.