A substance produced wholly or partly by chemical synthesis, which in low concentrations inhibits the growth or destroys micro organisms by intervening in their metabolic processes is

Options

A. Antiseptic
B. Antibiotics
C. Antipyretics
D. Disinfectants

Answer

To solve the question, we need to identify the substance that is produced by chemical synthesis and inhibits the growth or destroys microorganisms at low concentrations. Here’s the step-by-step solution:

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question describes a substance that can be produced wholly or partly through chemical synthesis.
- This substance should inhibit the growth or destroy microorganisms at low concentrations.

2. **Identifying Key Terms**:
- "Chemical synthesis": This means the substance can be created through chemical processes.
- "Inhibits growth or destroys microorganisms": This indicates that the substance has antimicrobial properties.

3. **Considering Possible Answers**:
- We need to think about substances that fit the description. Common terms related to inhibiting microorganisms include:
- Antibiotics
- Antiseptics
- Disinfectants

4. **Defining Each Option**:
- **Antibiotics**: Medications that can kill or inhibit the growth of bacteria. They are often used in low concentrations to treat infections.
- **Antiseptics**: Solutions that prevent the growth of microorganisms on living tissues (e.g., skin).
- **Disinfectants**: Chemicals that destroy microorganisms on non-living surfaces.

5. **Choosing the Correct Answer**:
- Since the question specifies a substance that can be produced by chemical synthesis and works at low concentrations to inhibit or destroy microorganisms, the best fit is **Antibiotics**.
- Antibiotics are specifically designed to target bacteria and can be synthesized chemically.

6. **Final Answer**:
- The correct answer to the question is **Antibiotics**.