What are the human blood groups and their antigens and antibodies?
BiologyClass 11CBSEAnswered 2 Jun 2026
Answer
Human blood groups are classified as A, B, AB, and O based on the presence of antigens on red blood cells and antibodies in plasma:
- Group A: A antigen, Anti-B antibody
- Group B: B antigen, Anti-A antibody
- Group AB: A and B antigens, no antibodies
- Group O: No antigens, Anti-A and Anti-B antibodies
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