A', the shopkeeper, has displayed his goods in glass showcase with the price tag prominently visible. 'B' identifies an item form the showcase for purchase and tells 'A' that he is ready to give the price displayed. 'A' realizes that the item did not have the correct price tag and refuses to sell it at the displayed price. Give the most appropriate answer.

A. A' is bound to sell the item as all the conditions of a valid contract are complete

B. A' is not bound to sell as 'B' has only made an offer to purchase and 'A' has still to accept the offer

C. A' is bound to sell as his display of goods in the showcase amounted to offer to sell

D. A' is not bound to sell though acceptance was complete

Answer: Option B