This question tests knowledge of which government department holds authoritative land records. The Revenue department is the correct answer because it is the primary custodian of land ownership records, property maps, and cadastral information. Hearing Officers rely on these official records to verify claims of ownership, boundaries, and legal possession, which are essential for resolving disputes related to immovable encroachments. Their records provide the definitive proof needed to ascertain the legality of a builder's claim.
The Police department (A) handles law enforcement, not land records.
The Municipal committee (C) manages urban services and building permits but does not maintain primary land ownership records.
The Environmental agency (D) focuses on environmental regulations, which are unrelated to property ownership verification.