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Blood groups . There are four main blood groups ( types of blood ) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are eight main blood groups .
Question : Which blood group is present in a universal donor?
Option 1: Blood group B
Option 2: Blood group AB
Option 3: Blood group A
Option 4: Blood group O
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