Person with blood group AB is considered as universal recipient because he has :

Options

A. Both A and B antigens in the plasma but no antibodies
B. Both A and B antigens on RBC but no antibodies in the plasma
C. Both A and B antibodies in the plasma
D. No antigen on RBC and no antibody in the plasma

Answer

To understand why a person with blood group AB is considered a universal recipient, we need to analyze the components of blood groups, specifically the presence of antigens and antibodies.

### Step-by-Step Solution:

1. **Understanding Blood Groups**:
- Blood groups are classified based on the presence of specific antigens on the surface of red blood cells (RBCs). The main blood groups are A, B, AB, and O.
- Blood group A has A antigens, blood group B has B antigens, blood group AB has both A and B antigens, and blood group O has no antigens.

2. **Antibodies in Plasma**:
- The body produces antibodies against antigens that are not present in its own blood. Therefore:
- Blood group A has anti-B antibodies.
- Blood group B has anti-A antibodies.
- Blood group AB has no antibodies (neither anti-A nor anti-B).
- Blood group O has both anti-A and anti-B antibodies.

3. **Characteristics of Blood Group AB**:
- A person with blood group AB has both A and B antigens on their RBCs.
- Importantly, they do not produce any antibodies against A or B antigens because they have both types of antigens.

4. **Universal Recipient Explanation**:
- Since individuals with blood group AB have no antibodies in their plasma, they can receive blood from any blood group (A, B, AB, or O) without the risk of an immune reaction.
- For example, if type A blood is transfused, there are no anti-A antibodies to attack the A antigens present in the transfused blood. The same applies to type B and type O blood.

5. **Conclusion**:
- Therefore, a person with blood group AB is considered a universal recipient because they have both A and B antigens on their RBCs and no antibodies in their plasma, allowing them to accept blood from any donor without adverse reactions.

### Answer:
A person with blood group AB is considered a universal recipient because he has both A and B antigens on RBCs but no antibodies in the plasma.

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