need help with this question

Which of the following statements in most correct? Select one: a: Income bonds pay interest based on an inflation index b. A convertible bond gives the issuer the right to exchange bonds for common stock, C. Putable bond allows bondholder to buy bonds from the company at a certain price at maturity, d. Warrants are options that permit the bondholder to buy stocks at a stated price. e. A callable bond gives the bondholder the right to sell the bonds back to the issuer under specified terms prior to the normal maturity date