Question

what are blood groups ​

Answer 1

Any of the various types of human blood whose antigen characteristics determine compatibility in transfusion. The best-known blood groups are those of the ABO system.

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Answer 2

Explanation:

Blood groups are complex chemical systems found on the surface of blood cells.

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.