Which one of the following is not a bacterial disease?

Options

A. Cholera
B. Tuberculosis
C. Anthrax
D. Influenza

Explanation

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which of the listed options is not a bacterial disease.

2. **Identify the Options**: The options provided are:
- A) Cholera
- B) Tuberculosis
- C) Anthrax
- D) Influenza

3. **Analyze Each Option**:
- **Cholera**: Caused by the bacterium *Vibrio cholerae*. It leads to severe diarrhea and is transmitted through contaminated food and water. Therefore, it is a bacterial disease.
- **Tuberculosis**: Caused by the bacterium *Mycobacterium tuberculosis*. It primarily affects the lungs and is a well-known bacterial infection. Thus, it is also a bacterial disease.
- **Anthrax**: Caused by the bacterium *Bacillus anthracis*. It is primarily found in domestic and wild animals and can infect humans. Hence, it is a bacterial disease as well.
- **Influenza**: Caused by the influenza virus. It is a viral infection that leads to symptoms similar to the common cold or flu. Therefore, it is not a bacterial disease.

4. **Conclusion**: Among the options, Influenza (Option D) is the only one that is not a bacterial disease, as it is caused by a virus.

### Final Answer:
The correct answer is **D) Influenza**.

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