Lanolin or woll fat is a

Options

A. Hard fat
B. Oil
C. Wax
D. Sterol.

Answer

**Step-by-Step Solution:**

1. **Understanding Lanolin**: Lanolin, also known as wool fat, is a substance secreted by the sebaceous glands of sheep. It is important to note that it is not simply wool but a specific type of fat derived from wool.

2. **Identifying Characteristics**: Lanolin has properties that help sheep to repel water and protect their skin from environmental changes. This characteristic is crucial in understanding its classification.

3. **Analyzing the Options**: The question provides four options:
- Hard fat
- Oil
- Wax
- Sterol

4. **Determining the Correct Classification**:
- **Hard fat** is typically solid at room temperature and is not the best fit for lanolin.
- **Oil** is liquid at room temperature, which does not align with the properties of lanolin.
- **Wax** is a long-chain fatty substance that is solid at room temperature and has protective qualities, similar to lanolin.
- **Sterol** refers to a class of organic compounds that include many hormones and vitamins, which does not accurately describe lanolin.

5. **Conclusion**: Given that lanolin has properties similar to wax and is used in various applications such as lubricants and rust prevention, the correct classification for lanolin or wool fat is **wax**.

**Final Answer**: Lanolin or wool fat is a type of **wax**.

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