What is the answer

Ben agrees to sell his new handphone to Jerry for RM100 even though * 1 point the handphone is worth RM3,000. Is the contract valid? No, Ben can ask for more money based on the market price. Yes, the consideration need not be sufficient Yes, but Ben can set aside the contract as it is voidable. No, the contract is unfair and unconscionable. An offer can be revoked by the following EXCEPT * 1 point O when the offeree sends the notice of revocation when the offeror dies or becomes insane O when the offeree makes an acceptance after a reasonable period to reply is over when the offeree fails to fulfil the conditions in the offer