Explanation : Offer and acceptance are two very important elem en ts, am on g other things, which constitute a contract. In fact, the making of a contract consists the proposal or offer by the proposer and the acceptance of the proposal or offer by the person to whom the said proposal is made. The contract becomes complete as soon as the acceptance is made and communicated to the proposer. An offer and its acceptance by the person to whom such offer is made becomes an agreement under the Law of Contract. Offer and acceptance which are essential elements of a contract must be absolutely clear and unambiguous. In order to see the sustainability of offer and acceptance from legal angle, one has to see whether the offer an d acceptance are founded on three components, namely, certainty, commitment and communication. If any of these components is missing, either in the offer or in the acceptance, the validity of a contract may be open to question.