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1. Which of the following antigens is found on the surface of type A red
blood cells in the ABO blood group system?
A. Antigen D
B. Antigen B
C. Antigen O
D. Antigen AB
Answer: B. Antigen B
Rationale: Antigen B is found on the surface of type A red blood cells in
the ABO blood group system.
2. Which of the following blood types would be considered the universal
donor in the ABO blood group system?
A. Type A
B. Type B
C. Type AB
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