The kinship relationship refers to the fact that there is no kinship between the parties and it is confirmed as a relative relationship through legal procedures. In China, the kinship relationship refers only to the situation clearly stipulated in the Marriage Law and the Adoption Law. According to the above definition, which of the following is the following one that is a blood relationship? ['adoptive father and adoptive son on the same household register.', 'Childcare workers and orphans.', 'Righteous Father and Righteous Son.', "Husband's illegitimate son and wife."]