Blood trasfusion is not possible between

Options

A. O (donar)-A(recipient)
B. O(donar)-B(recipient)
C. O(donar)-AB(recipient)
D. O(recipient)-AB(donar)

Answer

### Step-by-Step Solution:

1. **Understand Blood Groups**:
- There are four main blood groups: A, B, AB, and O. Each blood group can either be Rh positive (+) or Rh negative (-).

2. **Identify Universal Donor and Recipient**:
- The universal donor is O (can donate to any blood group).
- The universal recipient is AB (can receive from any blood group).

3. **Analyze the Given Combinations**:
- The question presents several combinations of donors and recipients:
- O as the donor and A as the recipient
- O as the donor and B as the recipient
- O as the donor and AB as the recipient
- AB as the donor and O as the recipient

4. **Determine Compatibility**:
- O can donate to A, B, and AB without any issues.
- AB can donate blood only to AB recipients.
- O cannot receive blood from AB because O does not have A or B antigens.

5. **Identify the Incorrect Combination**:
- The only combination where blood transfusion is not possible is when O is the recipient and AB is the donor. This is because O blood type has anti-A and anti-B antibodies, which will react against the A and B antigens present in AB blood.

6. **Conclusion**:
- Therefore, blood transfusion is not possible between O as the recipient and AB as the donor.

### Final Answer:
Blood transfusion is not possible between O as the recipient and AB as the donor.

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