The interest that a debenture holder receives at the time of each payment made by the issuer is:

the coupon rate multiplied by the face value of the net debenture liability.the market rate of interest multiplied by the present value of the opening balance of the net debenture liability.the market rate of interest multiplied by the present value of the closing balance of the net debenture liability.the coupon rate of interest multiplied by the present value of the opening balance of the net debenture liability.