Which of the following is not an antibiotic produced by bacteria ?

Options

A. Bacitracin
B. Polymyxin B
C. Griseofulvin
D. Amphotericin B

Answer

To solve the question "Which of the following is not an antibiotic produced by bacteria?", we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Bacitracin
- B) Polymyxin B
- C) Grisofulvin
- D) Amphotericin B

2. **Examine Bacitracin**:
- Bacitracin is a peptide antibiotic produced by the bacterium *Bacillus subtilis*.
- Since it is produced by a bacterium, it is **not the correct answer**.

3. **Examine Polymyxin B**:
- Polymyxin B is another antibiotic that is obtained from the bacterium *Bacillus polymyxa*.
- As it is also produced by a bacterium, it is **not the correct answer**.

4. **Examine Grisofulvin**:
- Grisofulvin is an antifungal agent that is obtained from the mold *Penicillium griseofulvum*.
- Since it is produced by a mold (which is a type of fungus), it is **the correct answer** as it is not produced by bacteria.

5. **Examine Amphotericin B**:
- Amphotericin B is an antifungal drug obtained from the bacterium *Streptomyces nodosus*.
- Since it is produced by a bacterium, it is **not the correct answer**.

### Conclusion:
Based on the analysis, the antibiotic that is **not produced by bacteria** is **C) Grisofulvin**.

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