What journal entries will be made in the following cases when the company redeems debentures at the expiry of the period by serving the notice:
(a) when debentures were issued at par with a condition to redeem them at a premium;
(b) when debentures were issued at a premium with a condition to redeem that at par; and
(c) when were debentures issued at discount with a condition to redeem them at a premium?