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EasyZoologyBlood groups
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In 2012 a B+ person has donated blood to his aunt and it was a safe transfusion. Now in 2015 his aunt is willing to donate blood to her B+ grandson who was injured in a road accident and need urgent transfusion. But the Doctor diagnosed that she can't donate, blood group of the aunt is :

A

A+

B

B+

C

AB+

D

O+

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