Concept:An irredeemable bond is a type of bond that pays interest to the investor indefinitely without repaying the capital amount.
Explanation:The bond described attracts interest regularly, but the capital (principal) is not repaid to the bondholder.
This means the investor keeps receiving interest payments without a promised date for the return of the original amount.
Such a bond is known as an irredeemable bond, also called a perpetual bond.
A redeemable bond has a maturity date when the capital is repaid.
A development bond and a long-term loan also involve repayment of capital.
Therefore, the bond that pays interest but leaves the capital unpaid is the irredeemable bond.
Answer:B. An irredeemable bond