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1. |
Although more than 400 blood groups have been identified,the ABO blood group system remains the most important in clinical medicine because: |
A. | It was the first blood group ststem to be discovered |
B. | It has four different blood groups A, B, AB, O(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 |
Answer» E. | |