__________ is a semi-synthetic fibre made from a naturally-occurring fibre called cellulose.

Options

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

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Type of Fiber**: The question asks for a semi-synthetic fiber. Semi-synthetic fibers are made from natural materials that have been chemically processed.

2. **Understand the Source Material**: The question specifies that the fiber is derived from cellulose, which is a naturally occurring substance found in the cell walls of plants.

3. **Consider the Options**: The options provided are rayon, polyester, nylon, and silk. We need to determine which of these is a semi-synthetic fiber made from cellulose.

4. **Analyze Each Option**:
- **Rayon**: This is a semi-synthetic fiber made from cellulose. It is produced by chemically treating cellulose or wood pulp.
- **Polyester**: This is a synthetic fiber made from petroleum products, not cellulose.
- **Nylon**: This is also a synthetic fiber made from petrochemicals, not derived from cellulose.
- **Silk**: This is a natural fiber produced by silkworms and is not semi-synthetic.

5. **Conclusion**: Since rayon is the only fiber among the options that is semi-synthetic and made from cellulose, the answer to the question is **rayon**.

**Final Answer**: Rayon is a semi-synthetic fiber made from a naturally-occurring fiber called cellulose.

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