Concept:A contract for the sale of land must be made with certain legal formalities, such as a deed or written document.
Explanation:Mr. Ojo paid N3,000, which means valuable consideration was present.
The payment also shows there was an offer and acceptance between the parties.
However, no deed of sale was signed.
For land transactions, the law requires a formal deed or written agreement to make the contract enforceable.
This missing document is known as a formality.
Answer:B. formality