A Patwari (also known by different names like Lekhpal, Talati, Karnam, etc., in various states) is a revenue official at the village level responsible for maintaining land records (like Khasra and Khatauni), measuring land, collecting land revenue, and providing information related to land ownership and cultivation. The other options, Lambardar, Zamindar (historical), and Zaildar (historical), were related to revenue collection and administration but were not primarily focused on the detailed maintenance of individual land records in the way a Patwari is.