Antibody are absent in which blood group :

Options

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

Answer

To determine in which blood group antibodies are absent, we will analyze each blood group and identify the antigens and antibodies present.

### Step-by-Step Solution:

1. **Identify Blood Group A**:
- **Antigen Present**: A
- **Antibody Present**: Anti-B
- **Conclusion**: Blood group A has antibodies (Anti-B).

2. **Identify Blood Group B**:
- **Antigen Present**: B
- **Antibody Present**: Anti-A
- **Conclusion**: Blood group B has antibodies (Anti-A).

3. **Identify Blood Group AB**:
- **Antigens Present**: A and B
- **Antibody Present**: None
- **Conclusion**: Blood group AB has no antibodies.

4. **Identify Blood Group O**:
- **Antigen Present**: None
- **Antibodies Present**: Anti-A and Anti-B
- **Conclusion**: Blood group O has antibodies (Anti-A and Anti-B).

5. **Final Conclusion**:
- The blood group that has no antibodies is **AB**.

### Answer:
Antibodies are absent in blood group **AB**.

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