You go to the market to purchase mangoes. Suppose 1 KG of mangoes = Rs. 45. If you purchase 1 KG of mangoes, seller will not discount the rate. But if you purchase mangoes in bulk amount then he will sell you at lower price. This is an example of:

(A) First-degree price discrimination
(B) Second-degree price discrimination
(C) Third-degree price discrimination
(D) Monopolistic competition