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A person with AB blood group is called a universal recipient. What feature of their plasma allows them to receive blood from any group?
ATheir plasma has both antibodies a and b
BTheir plasma has neither antibody a nor b
CTheir RBCs carry no antigens at all
DTheir RBCs carry only antigen A
Answer & Solution
Correct answer: B. Their plasma has neither antibody a nor b
1. A transfusion reaction occurs when recipient antibodies clump donor antigens.
2. To receive from any group, the recipient's plasma must lack anti-a and anti-b antibodies.
3. Option A (plasma has both antibodies) describes group O, the universal donor, not recipient, a trap.
4. Option C (RBCs carry no antigens) again describes group O, not AB.
5. Option D (only antigen A) describes group A, which is not a universal recipient.
6. AB individuals do carry both antigens, but their plasma has neither antibody.
7. With no antibodies to attack donor cells, AB can receive from all, option B.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 14 Transportation in Plants and Circulation in Animals "Blood Groups", p.218_
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