A couple requests blood typing of their child (father AB, mother B). Child erythrocytes are agglutinated by antigen B immunoglobulin, not agglutination by anti A or anti D) Child serum agglutinates A typed erythrocytes, does not agglutinate B typed erythrocytes. Which of following conclusions concerning child's blood type and child´s parentage:
Wähle eine oder mehr der folgenden: