Assertion `:-` Acid which reach intestine does not damage it.
Reason `:-` The mucous along with the bicarbonates from the pancreas protects the intestinal mucosa.

Options

A. If both Assertion & Reason are True & the Reasonn is a correct explanation of the Assertion .
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that the acid which reaches the intestine does not damage it. This is true because the intestine is protected from the acidic content that comes from the stomach.

2. **Understanding the Reason:**
- The reason provided is that mucus along with bicarbonates from the pancreas protects the intestinal mucosa. This is also true. The bicarbonates neutralize the acid, and mucus provides a protective layer.

3. **Role of Stomach Acid:**
- In the stomach, hydrochloric acid (HCl) is produced, which is necessary for digestion and killing harmful bacteria. However, when the digested food (chyme) moves to the small intestine, it contains this acid.

4. **Neutralization in the Intestine:**
- The small intestine has an alkaline environment due to the secretion of bicarbonates from the pancreas and bile salts. This alkaline medium neutralizes the acid from the stomach, preventing damage to the intestinal lining.

5. **Protection of Intestinal Mucosa:**
- The combination of mucus and bicarbonates not only neutralizes the acid but also protects the intestinal mucosa from potential damage. The mucus acts as a barrier, while bicarbonates help maintain a suitable pH for enzyme activity.

6. **Conclusion:**
- Both the assertion and reason are true, and the reason correctly explains the assertion. Thus, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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