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Physiology General 4c23200f

Although more than 400 blood groups have been identified, the ABO blood group system remains the most impoant in clinical medicine because:

A
It was the first blood group system to be discovered
B
It has four different blood groups A,B,AB4O(H)
C
ABO (H) antigens are present in most body tissues and fluids.
D
ABO (H) antibodies are invariably present in plasma when persons RBC lacks the corresponding antigen.
High-Yield Explanation
D i.e. ABO antibodies are invariably present in plasma when person RBC lacks the corresponding antigen
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