The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one

Options

A. Pepsin
B. Mucus
C. Salivary amylase
D. Bile

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which substance protects the inner lining of the stomach from hydrochloric acid.

2. **Identifying Components of Gastric Juice**: The gastric juice secreted by the walls of the stomach contains three main components:
- Enzyme pepsin
- Hydrochloric acid (HCl)
- Mucus

3. **Role of Hydrochloric Acid**: Hydrochloric acid is responsible for creating an acidic environment in the stomach, which is necessary for digestion but can also be harmful if it comes into direct contact with the stomach lining.

4. **Protection Mechanism**: The inner lining of the stomach is at risk of damage from the acidic environment created by hydrochloric acid. To protect itself, the stomach secretes mucus.

5. **Conclusion**: Among the options provided (pepsin, mucus, salivary amylase, and bile), the correct answer is **mucus** as it serves to protect the stomach lining from the corrosive effects of hydrochloric acid.

### Final Answer:
The inner lining of the stomach is protected by **mucus** from hydrochloric acid.

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