A) The person has no antigen for both A and B antibodies
B) His blood has antibodies for both A and B antigens
C) Both (a) and (b)
D) None of the above
Correct Answer: C
Solution :
Landsteiner recognised three blood groups i.e., A, B and O. Fourth blood group AB was discovered by Von Decastello and Sturle (1902). The blood group O has no antigens in RBC but contain both antibodies in RBC.
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