• Classification of Loan Securities in Agricultural Credit:
• Personal Security $\rightarrow$ Promissory Note: A promissory note (or Demand Promissory Note - DPN) is an unconditional written instrument signed by the borrower promising to pay a specified sum of money on demand or at a fixed date. It constitutes personal security based on the borrower's personal creditworthiness, character, and integrity without pledging specific physical assets. Personal sureties/guarantors also belong to this category.
• Collateral / Tangible / Real Security: Involves pledging specific movable or immovable physical assets:
• Land: Hypothecated or mortgaged (Simple/English Mortgage) as immovable real collateral.
• Tractor / Machinery: Hypothecated as movable chattel security.
• Gold: Pledged with the lender as physical collateral security.

Correct option: (4) Promissory Note