Juan's ex-wife gave birth to a daughter before they divorced, and has been paying court-ordered child support payments as a result of the divorce proceedings. Now he is suspicious that he is not the father of his supposed daughter. Juan does not know his ABO blood phenotype, but he knows that his parents are types B and O. He also knows his ex-wife is type AB, and the daughter in question type AB. Is Juan ruled out as the father of the child? Explain.