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Question

A certain road accident patient with an unknown blood group needs an immediate blood transfusion. Which blood group could be administered immediately without matching the blood?


A

Blood group A

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B

Blood group O

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C

Blood group AB

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D

Blood group B

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Solution

The correct option is B

Blood group O


Persons with blood group O posses both anti-A and anti-B antibodies in their plasma but have no antigens in their RBCs. So, RBCs of blood group ‘O’ do not show clumping in any of the two sera. That’s why O group can be transfused to anyone irrespective of their blood group and is called a universal donor.


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