Principle: Acceptance (of offer) must be communicated by the offeree to the offerer so as to given rise to a binding obligation. The expression 'by the offeree to the offerer' includes communication between their authorised agents.
Facts 'X' made an offer to buy Y's property for a stipulated price. 'Y' accepted it and communicated his acceptance to 'Z', a stranger.
Which of the following derivations is correct?