The term 'antitoxin' refers to a preparation containing

Options

A. B-lymphocytes and T-lymphocytes
B. antibodies to the toxin
C. weakend pathogen
D. inactivated T-lymphocytes.

Explanation

To answer the question "The term 'antitoxin' refers to a preparation containing," we need to analyze the options provided and understand what antitoxins are.

### Step-by-Step Solution:

1. **Understanding Antitoxins**:
- Antitoxins are substances that neutralize toxins. They are typically antibodies produced in response to a toxin or introduced into the body to provide immediate immunity.

2. **Identifying the Correct Definition**:
- The question asks for what an antitoxin preparation contains. Antitoxins specifically contain antibodies that target and neutralize a specific toxin.

3. **Evaluating the Options**:
- **B-lymphocytes**: These are a type of white blood cell involved in the immune response but are not what antitoxins are made of.
- **Anti-lymphocytes**: This term does not apply to antitoxins and is not relevant here.
- **Antibodies to the toxin**: This is the correct answer, as antitoxins are indeed preparations that contain antibodies specifically designed to neutralize toxins.
- **Weakened pathogen**: This is related to vaccines, not antitoxins. Vaccines use weakened or inactivated pathogens to stimulate an immune response.
- **Inactivated T-lymphocytes**: These are not involved in the preparation of antitoxins.

4. **Conclusion**:
- Based on the analysis, the correct answer is **"antibodies to the toxin."**

### Final Answer:
The term 'antitoxin' refers to a preparation containing **antibodies to the toxin**.