The correct answer is option 'B' - Agreement to sell.

Explanation:
An agreement for the sale of goods refers to a contract between a buyer and a seller for the purchase and sale of goods. In such an agreement, the terms and conditions of the sale are outlined, including the price, quantity, quality, and delivery of the goods.

When the agreement provides that the property would pass on to the buyer on full payment of price and execution of the sale deed, it is known as an agreement to sell.

Here is a detailed explanation of each option:

a) Sale:
A sale refers to the actual transfer of ownership of goods from the seller to the buyer. In a sale, the property and ownership of the goods are immediately transferred to the buyer upon payment of the price. However, in the given scenario, the property would pass on the buyer only on full payment of price and execution of sale deed. Therefore, option 'a' is incorrect.

b) Agreement to sell:
An agreement to sell refers to a contract where the seller agrees to transfer the ownership of goods to the buyer at a future date or upon the occurrence of certain conditions. In this case, the agreement provides that the property would pass on the buyer on full payment of price and execution of the sale deed. Therefore, option 'b' is the correct answer.

c) Hire purchase agreement:
A hire purchase agreement is a type of agreement where the buyer pays for the goods in installments and obtains possession and use of the goods immediately. Ownership of the goods is transferred to the buyer only after the payment of the final installment. In the given scenario, there is no mention of installments or possession of goods before full payment, so option 'c' is incorrect.

d) Sale on approval:
A sale on approval refers to a transaction where the buyer has the option to return the goods within a specified period if they are not satisfied with them. The buyer has the right to inspect and test the goods before making a final decision. In the given scenario, there is no mention of approval or return of goods, so option 'd' is incorrect.

In conclusion, the correct answer is option 'b' - Agreement to sell, as it best describes the scenario where the property would pass on the buyer on full payment of price and execution of the sale deed.

Because,if we get the goods on time it means sale of goods and if we get the goods in future or at deffered time it means agreement to sale and we get the goods on payment of last installment it known as hire purchase agreement