Which of the following blood groups is universal donor and universal acceptors respectively?

Options

A. AB, O
B. O, AB
C. AB, A
D. A, AB

Answer

To determine which blood groups are universal donors and universal acceptors, we need to understand the characteristics of different blood groups and their compatibility.

### Step-by-Step Solution:

1. **Understanding Blood Groups**:
- Human blood is classified into four main groups: A, B, AB, and O. Each of these groups can be either Rh-positive (+) or Rh-negative (-), leading to a total of eight blood types.

2. **Identifying the Universal Donor**:
- The universal donor blood group is O negative (O-). This is because O negative blood does not have A or B antigens on the surface of its red blood cells. Therefore, it can be given to any other blood group without causing an immune reaction.

3. **Identifying the Universal Acceptor**:
- The universal acceptor blood group is AB positive (AB+). Individuals with AB+ blood have both A and B antigens, as well as the Rh factor. This means they can receive blood from any blood group without an adverse reaction.

4. **Conclusion**:
- Therefore, the universal donor is O negative (O-) and the universal acceptor is AB positive (AB+).

### Final Answer:
- Universal Donor: O negative (O-)
- Universal Acceptor: AB positive (AB+)