0 Question: What are the main four blood groups? Keywords: blood, blood group Asked by Brie mode fearless to Theresia, Katie on 13 Nov 2014.
Theresia Mina answered on 13 Nov 2014:
O, A, B and AB. O the is the most frequent and AB is the rarest!
Katie Pickering answered on 14 Nov 2014:
Theresia has this covered. Hope it helps.
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