Which one of the following best describes the term "Merchant Discount Rate" sometimes seen in news?

1. A

   The incentive given by a bank to a merchant for accepting payments through debit cards pertaining to that bank.

   (a) This describes a bank incentive to the merchant. MDR is a charge the merchant pays, not a reward the bank pays the merchant, so this letter is not the key.

2. B

   The amount paid back by banks to their customers when they use debit cards for financial transactions for purchasing goods or services.

   (b) This is a cashback or reward to the cardholder. Merchant Discount Rate is levied on the merchant, not paid back to customers, so it is not the key.

3. C

   The charge to a merchant by a bank for accepting payments from his customers through the bank's debit cards.

   (c) (c) Official key: Merchant Discount Rate is the fee a bank or card network deducts when a merchant accepts a debit (or credit) card payment. It is a merchant-side acceptance cost, which matches the stored key.

4. D

   The incentive given by the Government to merchants for promoting digital payments by their customers through Point of Sale (PoS) machines and debit cards.

   (d) This is a government incentive for digital payments and PoS, not the definition of MDR. Policy subsidies are distinct from the bank’s merchant charge, so this is not the key.

Summary. Official key is (c). MDR is the charge a merchant pays the acquiring bank for accepting card payments. It is not a bank incentive to the shop, not a customer cashback, and not a government PoS subsidy. Honour the stored letter (c).