Correct Option: D. AB
Detailed Explanation:
- Understanding Blood Groups:
- Human blood is classified into four main groups based on the presence or absence of specific antigens on the surface of red blood cells. These groups are A, B, AB, and O.
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The ABO blood group system is determined by the presence of two antigens: A and B.
- Type A has A antigens.
- Type B has B antigens.
- Type AB has both A and B antigens.
- Type O has neither A nor B antigens.
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Universal Recipients:
- The blood group AB is known as the universal recipient. This means that individuals with this blood type can receive blood from any of the other blood types (A, B, AB, and O) without experiencing an immune reaction.
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This is because they do not have antibodies against A or B antigens in their plasma. Therefore, when they receive blood from any donor, their immune system does not attack the transfused blood cells.
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Why Other Options Are Incorrect:
- Option A: A. O:
- Individuals with blood type A have A antigens and produce anti-B antibodies. This means they cannot receive blood from type B or AB donors without risking a serious immune reaction.
- Option B: B. A:
- Individuals with blood type B have B antigens and produce anti-A antibodies. They cannot receive blood from type A or AB donors for the same reason as above.
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Option C: C. B:
- This option is similar to option B. Individuals with blood type B can only receive blood from type B and type O donors, not from type A or AB donors.
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Summary of Blood Group Compatibility:
- Type A: Can receive A and O blood.
- Type B: Can receive B and O blood.
- Type AB: Can receive A, B, AB, and O blood (universal recipient).
- Type O: Can only receive O blood (universal donor).
Common Pitfalls:
- Confusing the terms "universal donor" and "universal recipient." Type O is the universal donor (can give to anyone), while type AB is the universal recipient (can receive from anyone).
- Not remembering that the presence of antibodies in the plasma is what determines compatibility in blood transfusions.
Revision Summary:
- Blood group AB can receive blood from all other groups (A, B, AB, O) due to the absence of anti-A and anti-B antibodies.
- Type A can only receive A and O; Type B can only receive B and O; Type O can only receive O.
- Understanding blood group compatibility is crucial for safe blood transfusions.
- Remember the distinction between universal donor (Type O) and universal recipient (Type AB).