Which of the given below is a natural biodegradable polymer ?

Options

A. Nylon - 2 Nylon - 6
B. Polythene
C. Cellulose
D. Polyvinyl chloride

Answer

To determine which of the given options is a natural biodegradable polymer, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options (A, B, C, D). We need to analyze each one to determine if it is a natural biodegradable polymer.

2. **Analyze Nylon 2 and Nylon 6**:
- **Definition**: Nylon is a type of synthetic polymer.
- **Conclusion**: Since it is man-made and synthetic, it is not a natural biodegradable polymer.

3. **Analyze Polythene**:
- **Definition**: Polythene (or polyethylene) is a widely used plastic.
- **Conclusion**: It is known to be non-biodegradable, meaning it does not break down naturally in the environment.

4. **Analyze Cellulose**:
- **Definition**: Cellulose is a natural polymer found in the cell walls of plants.
- **Conclusion**: It is biodegradable, as it can be broken down by microorganisms in the environment.

5. **Analyze Polyvinyl Chloride (PVC)**:
- **Definition**: PVC is another synthetic polymer commonly used in construction and plumbing.
- **Conclusion**: Like nylon and polythene, PVC is non-biodegradable.

6. **Final Conclusion**: After analyzing all the options, we find that only cellulose is a natural biodegradable polymer.

### Answer:
The correct option is **C: Cellulose**.

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