Which of the following is/are example of natural polymer

Options

A. Wool
B. Silk
C. Leather
D. Nylon

Explanation

To determine which of the provided options are examples of natural polymers, we need to analyze each option based on their composition and origin.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- a) Wool
- b) Silk
- c) Leather
- d) Nylon

2. **Analyze Each Option**:
- **Wool**: Wool is derived from the fur of sheep and is primarily composed of a protein called keratin. Since keratin is a natural protein, wool is classified as a natural polymer.
- **Silk**: Silk is produced by silkworms and is made up of a protein called fibroin. Fibroin is also a natural protein, which means silk is a natural polymer.
- **Leather**: Leather is made from the hides of animals and is primarily composed of collagen, a natural protein. Therefore, leather is also classified as a natural polymer.
- **Nylon**: Nylon is a synthetic polymer, created through chemical processes. It does not occur naturally and is not derived from natural sources, making it a synthetic polymer.

3. **Conclusion**: Based on the analysis:
- Wool (a) is a natural polymer.
- Silk (b) is a natural polymer.
- Leather (c) is a natural polymer.
- Nylon (d) is not a natural polymer.

Thus, the correct answer is that options **a, b, and c** (Wool, Silk, and Leather) are examples of natural polymers.

### Final Answer:
The examples of natural polymers from the options provided are:
- Wool
- Silk
- Leather