Bharat Bill Payment System is a major component of the retail payment transactions in India, and is characterized by the presence of large number of billers, who provide a variety of payment options to their customers. According to information available on the RBI website, the top 20 cities are generating INR how much amount in bill payments every year?
A. INR 16,810 billion
B. INR 4,703 billion
C. INR 10,172 billion
D. INR 6,223 billion
