Explanation:

A dentist agrees to supply a set of teeth to his patient with his own material for a sum of Rs 500. Section 4 of Sale of Goods Act provides for  Sale and agreement to sell. It states a contract of sale of goods is a contract whereby the seller transfers or agrees to transfer the property in goods to the buyer for a price. There may be a contract of sale between one part-owner and another. In the present case, all the essentials of the contract of sale are fulfilled.