Correct Answer:
B. Official authentication and legal documents
The Authority's common seal is used for Official authentication and legal documents. A common seal is a legal instrument that signifies the official approval and authenticity of a corporate body or authority on important documents such as contracts, deeds, and certificates, providing them with legal validity and proof of consent.
- Using it for Decorating its office is purely aesthetic and not its legal purpose.
- While evidence might be sealed, a common seal is specifically for authenticating the Authority's own documents, not for general Sealing evidence.
- It is not used for Awarding prizes; its purpose is formal legal authentication.