The biodegradable polymer is :

Options

A. Buna-S
B. nylon-6,6
C. nylon 2-nylon 6
D. nylon-6

Explanation

To determine which of the given options is a biodegradable polymer, we need to analyze the options provided and identify the one that fits the definition of biodegradable.

### Step-by-Step Solution:

1. **Understand Biodegradable Polymers**:
- Biodegradable polymers are materials that can decompose naturally in the environment, typically through the action of living organisms, such as bacteria or fungi. They are eco-friendly and do not cause harm to the environment.

2. **Identify the Given Options**:
- The options provided in the question are:
- A) Buna
- B) Nylon 6,6
- C) Nylon 2
- D) Nylon 6

3. **Analyze Each Option**:
- **Buna**: This is a synthetic rubber and is not biodegradable.
- **Nylon 6,6**: This is a type of nylon that is also synthetic and not biodegradable.
- **Nylon 2**: This is a type of nylon that is known to be biodegradable.
- **Nylon 6**: Similar to Nylon 6,6, this is also synthetic and not biodegradable.

4. **Conclusion**:
- Among the options, **Nylon 2** is the only biodegradable polymer. Therefore, the correct answer is **C) Nylon 2**.

### Final Answer:
The biodegradable polymer is **C) Nylon 2**.