___________ was the first fully-synthetic fibre that was made using no natural materials.

Options

A. Nylon
B. Rayon
C. Polyester
D. Acrylic

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the first fully synthetic fiber that was created without using any natural materials.

2. **Identifying the Options**: The options provided are nylon, rayon, polyester, and acrylic.

3. **Analyzing the Options**:
- **Rayon**: This is a semi-synthetic fiber made from natural materials (cellulose).
- **Polyester**: This is a synthetic fiber, but it was developed after nylon.
- **Acrylic**: This is also a synthetic fiber, but it was introduced after nylon.
- **Nylon**: This is known to be the first fully synthetic fiber created without any natural materials.

4. **Conclusion**: Based on the analysis, the correct answer is **nylon**.

5. **Final Answer**: Nylon was the first fully-synthetic fiber that was made using no natural materials.

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