The difference between a discount of 40% on Rs. 500 and two successive discount of 36% and 4% on the same amount is:________?

A. 0
B. Rs. 2
C. Rs. 1.93
D. Rs. 7.20
Explanation:
Sale after 40% discount = 60% of Rs. 500 = Rs. 300
Price after 36% discount = 64% of Rs. 500 = Rs. 320
Price after next 4% discount = 96% of Rs. 320 = Rs. 307.20
Difference in two prices = Rs. 7.20