Blood group A person can

Options

A. Be parent of a child with B blood group
B. Possess only B-antigen
C. Safely receive blood from a donor of B-group
D. Possess both antigens A and B

Answer

To solve the question regarding what a person with blood group A can do or possess, we need to analyze the characteristics of blood group A and its compatibility with other blood groups.

### Step-by-Step Solution:

1. **Understanding Blood Group A**:
- A person with blood group A has A antigens on the surface of their red blood cells (RBCs). This means their genotype can either be homozygous (IAIA) or heterozygous (IAi).

2. **Analyzing the Options**:
- **Option 1**: "Be parent of a child with B blood group".
- This is possible if the other parent has a B blood group (IBIB or IBi). If the A blood group parent is heterozygous (IAi), they can produce offspring with blood group B (IBi).
- **Option 2**: "Possess only B antigen".
- This is incorrect because a person with blood group A has A antigens, not B antigens.
- **Option 3**: "Safely receive blood from donor of B blood group".
- This is incorrect. A person with blood group A can receive blood from A or O blood groups but not from B blood group due to the presence of anti-B antibodies.
- **Option 4**: "Possess both antigens A and B".
- This is incorrect as this statement describes blood group AB, not A.

3. **Conclusion**:
- The only correct statement is that a person with blood group A can be a parent of a child with blood group B.

### Final Answer:
- A person with blood group A can **be a parent of a child with B blood group**.

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