The blood of a person having group A can not be tranfused into a person of blood group B because

Options

A. donor has `beta`-antibodies
B. recipient has B-antigen
C. both the these
D. donor has A-antigen and recipient has `alpha`-antibodies

Answer

### Step-by-Step Solution:

1. **Understanding Blood Groups**: Blood groups are determined by the presence of specific antigens on the surface of red blood cells (RBCs) and corresponding antibodies in the plasma. The main blood groups are A, B, AB, and O.

2. **Identifying Antigens and Antibodies**:
- **Blood Group A**:
- Antigen: A
- Antibody: B
- **Blood Group B**:
- Antigen: B
- Antibody: A

3. **Analyzing the Transfusion Scenario**:
- When blood from a person with blood group A is transfused into a person with blood group B, the following occurs:
- The blood group A has A antigens on its RBCs.
- The blood group B has B antibodies in its plasma.

4. **Antigen-Antibody Reaction**:
- The B antibodies present in the recipient's plasma will react against the A antigens from the donor's blood. This reaction can lead to serious complications, including hemolysis (destruction of red blood cells) and other adverse reactions.

5. **Conclusion**:
- Therefore, blood from a person with group A cannot be transfused into a person with blood group B because the recipient (group B) has antibodies against the A antigens present in the donor's (group A) blood. This leads to an antigen-antibody reaction that can be harmful.

### Final Answer:
The blood of a person having group A cannot be transfused into a person of blood group B because the donor has A antigens and the recipient has B antibodies, leading to an incompatible reaction.