Free Set
Question
Which blood group is called the universal donor?
Options
AA
BB
CAB
DO negative Correct Answer
Correct Answer & Explanation
Option D: O negative
Rationale
O negative blood group lacks A, B, and Rh antigens, making it compatible for transfusion to patients of any blood group during emergencies. However, cross-matching is still recommended whenever possible to avoid transfusion reactions.
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