The chemical substances produced by some microbes which can kill or inhibit the growth of other microbes are called

Options

A. antiseptics
B. antacids
C. antibiotics
D. all of these

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the name of chemical substances produced by some microbes that can kill or inhibit the growth of other microbes.

2. **Understand the Options**: The options provided are:
- A) Antiseptic
- B) Antacids
- C) Antibiotic
- D) All of these

3. **Analyze Each Option**:
- **Antiseptic**: These are substances that are applied to living tissues to reduce the possibility of infection. They do not inhibit the growth of microbes internally and are not produced by microbes.
- **Antacids**: These are medications that neutralize stomach acidity and are not related to microbial production or inhibition of other microbes.
- **Antibiotic**: These are substances produced by certain microbes (like bacteria and fungi) that can kill or inhibit the growth of other microbes, particularly bacteria. Examples include penicillin and streptomycin.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **C) Antibiotic**. Antibiotics are specifically known for their ability to inhibit or kill other microbes.

5. **Conclusion**: The chemical substances produced by some microbes which can kill or inhibit the growth of other microbes are called **antibiotics**.

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