Which is incorrectly matched

Options

A. Renin - liver
B. Ptyalin - mouth
C. Pepsin - stomach
D. Trypsin - intestine

Answer

To solve the question "Which is incorrectly matched?", we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Renin secreted by the liver
- B) Tylenol by the mouth
- C) Pepsin by the stomach
- D) Trypsin by the intestine

2. **Analyze Option A**:
- **Renin**: This is an enzyme involved in the regulation of blood pressure.
- **Source**: Renin is secreted by the juxtaglomerular cells of the kidneys, not the liver.
- **Conclusion**: This option is incorrectly matched.

3. **Analyze Option B**:
- **Tylenol**: This is a common pain reliever, also known as acetaminophen.
- **Administration**: It is typically taken orally (by mouth).
- **Conclusion**: This option is correctly matched.

4. **Analyze Option C**:
- **Pepsin**: This is an enzyme that helps digest proteins.
- **Source**: Pepsin is secreted by the gastric chief cells in the stomach.
- **Conclusion**: This option is correctly matched.

5. **Analyze Option D**:
- **Trypsin**: This is another enzyme that digests proteins.
- **Source**: Trypsin is secreted by the pancreas and acts in the small intestine.
- **Conclusion**: This option is correctly matched.

6. **Final Conclusion**:
- The only incorrectly matched option is A) Renin secreted by the liver. Renin is actually secreted by the kidneys.

### Answer:
The incorrectly matched option is A) Renin secreted by the liver.

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