Which of the following is not true

Options

A. Prontosil is not converted into sulphanilamide in the body
B. Erythromycin is a bacteriostatic antibiotic
C. Vancomycin is a broad spectrum antibiotic
D. Ampicillin is not a natural antibiotic

Explanation

To determine which statement is not true regarding the given options, we will analyze each statement based on the information provided in the video transcript.

### Step-by-Step Solution:

1. **Understanding Pontosil**:
- Pontosil is described as an antibacterial drug and is categorized as a sulfonamide.
- The statement claims that Pontosil is not converted into sulphanilamide in the body.

2. **Metabolism of Pontosil**:
- According to the transcript, Pontosil is indeed metabolized to sulphanilamide in the body.
- Therefore, the claim that it is not converted is false.

3. **Analyzing Erythromycin**:
- The transcript states that erythromycin is an antibacterial drug that prevents the growth of bacteria.
- This statement is true, as erythromycin is known for its antibacterial properties.

4. **Understanding Vancomycin**:
- The transcript mentions that vancomycin is a type of antibiotic.
- This is also true, as vancomycin is widely recognized as an effective antibiotic.

5. **Evaluating Mupirocin**:
- The transcript indicates that mupirocin is not a natural antibiotic.
- This is true, as mupirocin is a synthetic antibiotic.

6. **Conclusion**:
- The only statement that is not true is the one regarding Pontosil, which claims it is not converted into sulphanilamide in the body.

### Final Answer:
The statement that is not true is: "Pontosil is not converted into sulphanilamide in the body."

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