EasyZoologyBody fluid and circulation
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Which blood group is known as the 'universal donor'?
A
A
B
B
C
AB
D
O
Explanation
Blood group O is the universal donor because O-group RBCs have neither A nor B antigens on their surface, so they will not cause an agglutination reaction in any recipient (A, B, AB, or O). AB blood group is the universal recipient as it has no antibodies in plasma.
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