Which of the following statement is correct about debenture?

Depending upon the terms and conditions of issue and redemption of debentures, the following six situations are commonly found in practice.
(i) Issued at par and redeemable at par
(ii) Issued at discount and redeemable at par
(iii) Issued at a premium and redeemable at par
(iv) Issued at par and redeemable at a premium
(v) Issued at a discount and redeemable at a premium
(vi) Issued at a premium and redeemable at a premium