A person with no antigen on RBC and antibodies A and B in plasma

Options

A. is a universal donor
B. without immune system
C. cannot donate blood
D. is due to Co-dominance

Answer

To determine the blood group of a person who has no antigens on their red blood cells (RBCs) and has both anti-A and anti-B antibodies in their plasma, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Blood Groups**: Blood groups are determined by the presence or absence of specific antigens on the surface of red blood cells. The main blood groups are A, B, AB, and O.

2. **Identifying Antigens and Antibodies**:
- **Blood Group A**: Has A antigens on RBCs and anti-B antibodies in plasma.
- **Blood Group B**: Has B antigens on RBCs and anti-A antibodies in plasma.
- **Blood Group AB**: Has both A and B antigens on RBCs and no antibodies against A or B in plasma.
- **Blood Group O**: Has no antigens on RBCs and has both anti-A and anti-B antibodies in plasma.

3. **Analyzing the Given Condition**: The person in question has:
- No antigens on RBCs
- Anti-A and anti-B antibodies in plasma

4. **Matching with Blood Groups**:
- Since the person has no antigens, they cannot be blood group A, B, or AB, as those groups have specific antigens.
- The only blood group that matches this description is blood group O, which has no antigens and contains both anti-A and anti-B antibodies.

5. **Conclusion**: Therefore, the person with no antigens on their RBCs and both anti-A and anti-B antibodies in their plasma is classified as blood group O, which is known as the universal donor.

### Final Answer:
The person is of blood group O.

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