Study of interaction of antigen and antibody in blood is

Options

A. Haematology
B. Serology
C. Cryobiology
D. Angiology

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the specific field of study that focuses on the interaction between antigens and antibodies in the blood.

2. **Identifying Relevant Terms**:
- **Antigen**: A substance that induces an immune response, typically a foreign substance.
- **Antibody**: A protein produced by the immune system to neutralize or destroy antigens.

3. **Exploring Related Fields**:
- **Hematology**: This is the study of blood and its disorders, but it does not specifically focus on the interaction between antigens and antibodies.
- **Serology**: This is the specific study of serum and the immune response in the blood, particularly the interactions between antigens and antibodies.
- **Cryobiology**: This field studies the effects of low temperatures on living organisms, which is unrelated to antigen-antibody interactions.
- **Angiology**: This is the study of blood vessels and lymphatic system diseases, which also does not pertain to the interaction of antigens and antibodies.

4. **Conclusion**: After analyzing the definitions and relevance of each field, it is clear that the correct answer to the question is **Serology**.

5. **Final Answer**: The study of interaction of antigen and antibody in blood is called **Serology**.

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