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

Options

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

Answer

To determine why a person with blood group AB is considered a universal recipient, we can analyze the characteristics of blood groups and the presence of antigens and antibodies.

### Step-by-Step Solution:

1. **Understanding Blood Groups**:
Blood groups are classified based on the presence or absence of specific antigens on the surface of red blood cells (RBCs). The main blood group antigens are A and B.

2. **Blood Group AB Characteristics**:
- A person with blood group AB has both A and B antigens present on their RBCs. This means that their blood cells can accept both A and B blood types without triggering an immune response.

3. **Presence of Antibodies**:
- Individuals with blood group AB do not have anti-A or anti-B antibodies in their plasma. This is crucial because antibodies are responsible for attacking foreign antigens. Since AB individuals lack these antibodies, they can receive blood from any other blood group without risk of agglutination (clumping) or rejection.

4. **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. This allows them to receive blood from any of the other blood groups (A, B, AB, or O) safely.

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

The correct option is:
**Option A: Both A and B antigens on RBC, but no antibodies in the plasma.**

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