The following are true about the ABO and rhesus (Rh) system:
a. a person of group O is a universal donor
b. a person who is group AB has anti-A and anti-B antibodies
c. the presence of the D antigen means that the subject is Rh positive
d. rhesus antibodies occur naturally

1 Answer

Answer :

the presence of the D antigen means that the subject is Rh positiv

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