Pick out the one which does not belong to the family

Options

A. pepsin
B. Cellulose
C. ptyalin
D. lipase

Explanation

To solve the question of which item does not belong to the family, we need to analyze the given options and categorize them based on their functions and classifications.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are pepsin, plytine, lip, and cellulose.

2. **Classify Each Option**:
- **Pepsin**: This is an enzyme that helps in the digestion of proteins in the stomach.
- **Plytine**: This is also an enzyme, specifically involved in the digestion of starches.
- **Lip**: This refers to lipase, which is an enzyme that breaks down fats.
- **Cellulose**: This is a carbohydrate, specifically a polysaccharide that serves as a structural component in plant cell walls.

3. **Determine the Common Family**: The first three options (pepsin, plytine, and lip) are all enzymes, which are biological catalysts that speed up chemical reactions in the body.

4. **Identify the Odd One Out**: Cellulose is not an enzyme; it is a carbohydrate. Therefore, it does not belong to the same family as the other three options.

5. **Conclusion**: The item that does not belong to the family is **cellulose**.

### Final Answer:
Cellulose is the one that does not belong to the family.