....................contains a contract for repayment of principal after a specified period or at intervals or at the option of the company and for payment of interest at a fixed rate payable usually either half-yearly or yearly on fixed dates.

Debenture

The correct answer is option 3- Debenture.

Debenture is a written instrument acknowledging a debt under the common seal of the company. It contains a contract for repayment of principal after a specified period or at intervals or at the option of the company and for payment of interest at a fixed rate payable usually either half-yearly or yearly on fixed dates. According to section 2(30) of The Companies Act, 2013 ‘Debenture’ includes Debenture Inventory, Bonds and any other securities of a company whether constituting a charge on the assets of the company or not.