Which of the following is a biodegradable polymer?

Options

A. Cellulose
B. Polythene
C. Polyvinyl chloride
D. Nylon-6,10

Answer

To determine which of the following is a biodegradable polymer, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Definition of Biodegradable Polymers**:
- A biodegradable polymer is one that can be broken down by microorganisms into natural substances like water, carbon dioxide, and biomass.

2. **Analyze the Options**:
- **Option 1: Cellulose**:
- Cellulose is a natural polymer made from beta-glucose units. It is found in the cell walls of plants.
- **Decomposition**: Cellulose is known to be biodegradable as it can be broken down by bacteria and fungi in the environment.

- **Option 2: Polythene (Polyethylene)**:
- Polythene is a synthetic polymer commonly used in plastic bags and containers.
- **Decomposition**: It is non-biodegradable and can persist in the environment for hundreds of years.

- **Option 3: PVC (Polyvinyl Chloride)**:
- PVC is a synthetic plastic used in plumbing, wiring, and other applications.
- **Decomposition**: Like polythene, PVC is also non-biodegradable and poses environmental concerns.

- **Option 4: Nylon 6**:
- Nylon 6 is a synthetic polymer used in textiles and other applications.
- **Decomposition**: Nylon 6 is not biodegradable and can take a long time to decompose in the environment.

3. **Conclusion**:
- Among the options analyzed, **cellulose** is the only biodegradable polymer. The other options (polythene, PVC, and nylon 6) are non-biodegradable.

### Final Answer:
**Cellulose** is the biodegradable polymer.