Corporate bonds unsecured by any pledge of property are called:

Step by Step Explanation:

Debentures: Corporate bonds not backed by physical assets or collateral. They rely on the issuer’s creditworthiness.

Incorrect Options:

B: Trust certificates are a legacy term for bonds backed by a trust.

C: Collateral trust bonds are secured by financial assets.

D: GO bonds are issued by municipalities, not corporations.

References:

SEC Guide on Corporate Bonds:SEC Corporate Bonds.