“Boundary mark” includes:

The correct answer is Any mark natural or artificial. In legal and land revenue contexts, a “boundary mark” is broadly defined to include both natural features like rivers, hills, or trees, and artificial structures such as pillars, fences, or walls. This comprehensive definition ensures clear and unambiguous demarcation of land and administrative boundaries, which is a foundational concept in property law.

• Only natural boundaries is too restrictive, excluding man-made markers.
• Water bodies are a type of natural boundary but do not encompass all possible boundary marks.
• Khasra numbers are land parcel identifiers, not physical boundary marks themselves.