Which substance of saliva destroy the harmful bacteria

Options

A. Cerumin
B. Chyme
C. Lysozyme
D. Secretin

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which substance in saliva is responsible for destroying harmful bacteria.

2. **Analyzing the Options**: We have four options to consider: Cerumen, Qaim, Lysozyme, and Secretin.

3. **Evaluating Option 1 - Cerumen**: Cerumen is not a component of saliva; it is produced by ceruminous glands in the ears. Therefore, this option is incorrect.

4. **Evaluating Option 2 - Qaim**: Qaim (more commonly spelled as chyme) refers to the semi-fluid mass of partly digested food and gastric juices in the intestines. It is not related to saliva, making this option incorrect as well.

5. **Evaluating Option 3 - Lysozyme**: Lysozyme is an enzyme found in saliva that has bactericidal properties. It works by degrading the cell walls of bacteria, effectively killing them. This makes lysozyme the correct answer.

6. **Evaluating Option 4 - Secretin**: Secretin is a hormone secreted by the duodenum that stimulates the pancreas and liver. It is not a component of saliva, thus this option is also incorrect.

7. **Conclusion**: After evaluating all options, the correct answer is Lysozyme, as it is the substance in saliva that destroys harmful bacteria.

**Final Answer**: Lysozyme is the substance of saliva that destroys harmful bacteria.

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