Wright Ltd. issued 40000, 8% debentures of Rs. 10 each at par which are redeemable after 8 years at a premium of 20%. The amount of loss on redemption of debentures to be written off every year will be

(a) Rs. 60,000
(b) Rs. 50,000
(c) Rs. 10,000
(d) Rs. 8,000