Persons with `___________` and `_____________` blood group are called universal recepients & universal donors respectively `:`

Options

A. `AB^(-),O^(+)`
B. `AO^(+),AB^(-)`
C. `O^(-),AB^(+)`
D. `AB^(+),O^(-)`

Answer

To answer the question, "Persons with `___________` and `_____________` blood group are called universal recipients & universal donors respectively," we need to identify the blood groups that fit these definitions.

### Step-by-Step Solution:

1. **Understanding Blood Groups**:
- There are four main blood groups: A, B, AB, and O.
- Each blood group has specific antigens on the surface of red blood cells (RBCs):
- A blood group has A antigens.
- B blood group has B antigens.
- AB blood group has both A and B antigens.
- O blood group has no antigens.

2. **Identifying Universal Donor**:
- The universal donor is the blood group that can donate blood to any other blood group without causing an immune response.
- Since O blood group has no antigens, it does not trigger an immune response in recipients.
- Therefore, the universal donor is **O** blood group.

3. **Identifying Universal Recipient**:
- The universal recipient is the blood group that can receive blood from any other blood group without producing antibodies against the donor's antigens.
- AB blood group has both A and B antigens and does not produce antibodies against either, making it capable of accepting blood from any group.
- Therefore, the universal recipient is **AB** blood group.

4. **Final Answer**:
- Persons with **AB** blood group are called universal recipients, and persons with **O** blood group are called universal donors.

### Answer:
Persons with **AB** and **O** blood group are called universal recipients & universal donors respectively.