What are the four blood groups in humans?

In humans, the four blood groups present are A, B, AB and O.

[Extra information for reference:

Human having blood group A possess two possibilities of antigen present in the blood:      IAIA or IAIO

Human having blood group B possess two possibilities of antigen present in the blood:      I^BI^B or I^BIO

Human with blood group O has no antigen present in the blood: IOIO_]

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Updated on: 21-Mar-2023

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