Can AB plus blood group marry O negative person?

No, a person with AB positive blood group cannot marry a person with O negative blood group. This is because a person with AB positive blood group has both A and B antigens on their red blood cells, while a person with O negative blood group does not have any antigens on their red blood cells. If a person with AB positive blood group were to marry a person with O negative blood group, their children could have A, B, or AB blood group, but they could not have O blood group. This would be a problem because a person with O blood group can only receive blood transfusions from other people with O blood group. Therefore, a person with AB positive blood group should not marry a person with O negative blood group.