Multiple choice general knowledge

A person of which of the following blood groups is called a universal donor?

  1. O

  2. AB

  3. A

  4. B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood group O (especially O negative) is called the universal donor because it lacks A, B, and Rh antigens on red blood cells. This means it can be transfused to patients with any blood type without triggering an immune reaction. AB positive is the universal recipient, not donor.

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