Which of the following agreement is called a void agreement?

Agreement which is expressed in writing and registered under the law for the time being in force for the registration of documents, and is made on account of natural love and affection between parties standing in a near relation to each other

Agreement to compensate, wholly or in part, a person who has already voluntarily done something for the promisor, or something which the promisor was legally compellable to do

Agreement made inwriting and signed by the person to be charged therewith or by his agent generally or specially authorized in that behalf, to pay wholly or in part debt of which the creditor might have enforced payment but for the law for the limitation of suits