Final answer:
Income bonds do not pay interest unless the issuing company is profitable, which makes them different from term bonds, debenture bonds, and secured bonds.
Step-by-step explanation:
Bonds are debt securities that are used by companies to raise capital by borrowing money from investors. A specific type of bond, known as an income bond, does not pay interest unless the issuing company is profitable. This contrasts with other bond types, such as term bonds, which have a set maturity date, debenture bonds, which are unsecured and depend on the issuer's creditworthiness, and secured bonds, which are backed by collateral.
The answer to the question is: Bonds which do not pay interest unless the issuing company is profitable are called A. income bonds.