Given below is a statement of legal principle followed by factual situation. Apply the principle to the facts and select the most appropriate answer.
Principle: A contract requires a proposal and an acceptance of the proposal. It is necessary to make a binding contract, not only that the proposal be accepted, but also that the acceptance is notified to the proposer.
A sent a letter to B stating that he was willing to sell to B, 10 bags of rice at Rs.20/− each. B made a telephone call to A to inform him that he had accepted the offer. Just as he was stating his acceptance, a very noisy aircraft few over B's house. A was not able to heat the acceptance.