The correct option is
A Rs. 10,000, Rs. 10,000, Rs. 10,000, Rs. 10,000, Rs. 10,000, Rs. 8,000, Rs. 6,000, Rs. 4,000, Rs. 2,000 in each year respectively
Here, the discount is payable on the redeemable debentures i.e. Rs 1,00,000.
The discount of 10% on these debentures means Rs 10,000 per year. The expenses on issue amounted to Rs. 20,000 and 10% discount per year means that 10% of 20,000 i.e Rs 2,000 will be written off each year which means the expense will be Rs 10,000, then Rs 8,000, Rs 6,000, Rs 4000, Rs 2000.