Read the following statements
i. About 30% ofstarch is digested in buccal cavity
ii. Maximum fat digestion occurs in stomach
iii. Protein digestion is completed in intestine

Options

A. i and ii are correct
B. ii and iii are correct
C. I and iii are correct
D. All are correct

Answer

To analyze the statements provided in the question, we will evaluate each statement one by one based on our knowledge of digestion and absorption.

### Step-by-Step Solution:

1. **Evaluate Statement I: "About 30% of starch is digested in the buccal cavity."**
- Digestion of starch begins in the buccal cavity where saliva, produced by salivary glands, contains the enzyme salivary amylase. This enzyme breaks down starch into maltose. It is widely accepted that approximately 30% of starch is indeed digested in the buccal cavity.
- **Conclusion:** This statement is **correct**.

2. **Evaluate Statement II: "Maximum fat digestion occurs in the stomach."**
- While some fat digestion does occur in the stomach due to the presence of gastric lipase, the majority of fat digestion actually takes place in the small intestine. In the small intestine, bile emulsifies fats, allowing pancreatic lipase to effectively break down fats into fatty acids and glycerol. Therefore, the statement that maximum fat digestion occurs in the stomach is inaccurate.
- **Conclusion:** This statement is **incorrect**.

3. **Evaluate Statement III: "Protein digestion is completed in the intestine."**
- Protein digestion begins in the stomach with the action of pepsin and continues in the small intestine where pancreatic enzymes (such as trypsin and chymotrypsin) and intestinal enzymes (like dipeptidase) further break down proteins into amino acids. The complete digestion of proteins occurs in the intestine.
- **Conclusion:** This statement is **correct**.

### Final Assessment:
- Statement I is correct.
- Statement II is incorrect.
- Statement III is correct.

Thus, the correct statements are I and III, making the answer option C.

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