Select the odd one from the following and select the correct option.

Options

A. Ptyalin
B. Maltase
C. Lactase
D. Sucrase

Answer

To solve the question of selecting the odd one out from the given options, we will analyze each option based on their characteristics and functions.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are Tylene, Maltase, Lactase, and Sucrose.

2. **Analyze Tylene**:
- Tylene is an enzyme found in saliva.
- It is also known as amylase and is responsible for the initial digestion of starch in the mouth, breaking it down into simpler sugars.

3. **Analyze Maltase**:
- Maltase is an enzyme secreted from the small intestine.
- Its function is to convert maltose (a disaccharide) into glucose (a monosaccharide).

4. **Analyze Lactase**:
- Lactase is also an enzyme secreted from the small intestine.
- It breaks down lactose (the sugar found in milk) into glucose and galactose.

5. **Analyze Sucrose**:
- Sucrose is an enzyme (often referred to as sucrase) that is secreted from the small intestine.
- It converts sucrose (table sugar) into glucose and fructose.

6. **Comparison**:
- Tylene is the only enzyme that is secreted in the mouth, while Maltase, Lactase, and Sucrose are all secreted from the small intestine.

7. **Conclusion**:
- Since Tylene is the only enzyme that is not secreted from the small intestine, it is the odd one out.

### Final Answer:
The odd one out is **Tylene**.

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