Which blood group is known as the universal donor?
Correct answer: C. O negative
- A. AB positive
- B. A negative
- C. O negative
- D. B positive
Explanation
O negative red cells carry neither A nor B antigens nor the Rh D antigen, so they can be transfused to a recipient of any blood group in an emergency. AB positive is the universal recipient, for the mirror-image reason.
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The human body is studied through its organ systems, including digestion, respiration, circulation, excretion, nervous coordination, reproduction and immunity. Coverage also includes nutrients and deficiency diseases, hormones, blood groups, common infections, vaccines, sanitation and basic first aid, while distinguishing communicable diseases from inherited and lifestyle disorders.
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