Fibre among the following is

Options

A. Rubber
B. Buna-S
C. Nylon-66
D. Bakelite

Answer

To determine which of the given options is a fiber, we will analyze each option based on the classification of polymers.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are rubber, bunias, nylon 66, and bakelite.

2. **Classify Each Option**:
- **Rubber**: This is classified as an elastomer. Elastomers are polymers that have elastic properties, allowing them to stretch and return to their original shape.
- **Bunias**: This is also classified as an elastomer. Similar to rubber, it has elastic properties.
- **Nylon 66**: This is classified as a fiber. Nylon 66 is a synthetic polymer that exhibits strong intermolecular forces such as hydrogen bonding, making it suitable for use as a fiber.
- **Bakelite**: This is classified as a thermosetting plastic. Thermosetting plastics are polymers that, once set into a given shape, cannot be remolded or reused upon heating.

3. **Determine the Fiber**: Among the options, nylon 66 is the only one that falls under the category of fibers due to its strong intermolecular forces and structural properties.

4. **Final Answer**: The fiber among the following options is **nylon 66**.