Which set of substances is not used for making fibres?

Options

A. Silk, chemicals
B. Yak hair, camel hair
C. Husk, bones
D. Flax, wool

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which set of substances is not used for making fibers.

2. **Analyze the Options**:
- **Option A**: Chemical fibers (e.g., Nylon) - These are synthetic fibers made from chemicals and are widely used in the textile industry.
- **Option B**: Yak hair and Camel hair - Both of these are natural fibers derived from animals and are used to make various fabrics.
- **Option C**: Husk and Bones - Husk refers to the outer covering of grains or seeds, while bones are not a source of fibers.

3. **Identify the Correct Answer**:
- From the analysis, we see that options A and B consist of substances that are indeed used to make fibers. However, option C (Husk and Bones) does not consist of materials typically used for making fibers. Husk may have some uses, but it is not primarily a source of fiber, and bones do not produce fibers at all.

4. **Conclusion**: The correct answer is **C, Husk and Bones**, as they are not used for making fibers.

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