A person with blood group AB has which of the antigens in RBCs.

Options

A. A
B. B
C. A and B
D. None of the above

Answer

To determine which antigens are present in the red blood cells (RBCs) of a person with blood group AB, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the ABO Blood Group System**:
- The ABO blood group system consists of four main blood types: A, B, AB, and O. Each blood type is determined by the presence or absence of specific antigens on the surface of red blood cells.

2. **Identify Antigens for Each Blood Type**:
- Blood group A has A antigens.
- Blood group B has B antigens.
- Blood group AB has both A and B antigens.
- Blood group O has no antigens.

3. **Focus on Blood Group AB**:
- Since the question specifically asks about blood group AB, we need to note that individuals with this blood type have both A and B antigens present on their RBCs.

4. **Co-Dominance in Blood Group AB**:
- The presence of both A and B antigens in blood group AB is an example of co-dominance. This means that both types of antigens are expressed equally and are both dominant.

5. **Conclusion**:
- Therefore, a person with blood group AB has both A and B antigens on the surface of their red blood cells.

### Final Answer:
A person with blood group AB has both A and B antigens in their RBCs.

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