Choice "C" is correct. The implied warranty of fitness for particular purpose arises when the seller knows the particular purpose for which the buyer will use the goods and that the buyer is relying on the seller to choose suitable goods.Choice "a" is incorrect. This choice is not as good as choice "C" because it does not include the idea that the seller must know a particular purpose to which the buyer is to put the goods. It is not enough merely that the buyer has a particular purpose in mind. The buyer must inform the seller of the purpose for the warranty to arise.Choice "b" is incorrect. This choice is incorrect not only for the same reason that choice "a" is incorrect, but also because the seller need not be a merchant for the warranty of fitness to arise; nonmerchant sellers can make the warranty.Choice "d" is incorrect. The warranty does not arise unless both prongs are present; the buyer must inform the seller of a particular purpose and must rely on the seller to select suitable goods. The seller need not be a merchant.