Which among the following the not a pencilline derivative

Options

A. Penicillin-G
B. Ampicillin
C. Amoxicilline
D. Tetracycline

Answer

To determine which among the given options is not a penicillin derivative, we can analyze each option based on their classification and origin.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Penicillin G
- Ampicillin
- Amoxicillin
- Tetracycline

2. **Understand Penicillin Derivatives**: Penicillin derivatives are antibiotics that are derived from the penicillin mold. They include various types of penicillin that have been modified to enhance their effectiveness or spectrum of activity against bacteria.

3. **Analyze Each Option**:
- **Penicillin G**: This is a natural penicillin antibiotic, also known as Benzyl Penicillin. It is a well-known derivative of penicillin.
- **Ampicillin**: This is a semi-synthetic derivative of penicillin that is used to treat a variety of infections. It is indeed a penicillin derivative.
- **Amoxicillin**: This is another semi-synthetic derivative of penicillin, widely used for treating infections. It is also classified as a penicillin derivative.
- **Tetracycline**: This is a different class of antibiotic that is not derived from penicillin. It is used to treat a variety of bacterial infections but does not belong to the penicillin family.

4. **Conclusion**: Among the options, Tetracycline is not a penicillin derivative. Therefore, the correct answer is **Tetracycline**.

### Final Answer:
**Tetracycline** is not a penicillin derivative.

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