A fatty acid not synthesised in human body is

Options

A. Cholesterol
B. Linoleic acid
C. Glycerol
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a fatty acid that is not synthesized in the human body. This means we need to identify a fatty acid that humans must obtain from their diet.

2. **Analyzing the Options**: The options given are:
- Cholesterol
- Linoleic acid
- Glycerol
- None of the above

3. **Identifying Essential Fatty Acids**: Essential fatty acids are those that cannot be synthesized by the body and must be obtained through diet. Linoleic acid is known to be an essential fatty acid.

4. **Evaluating Each Option**:
- **Cholesterol**: This is a sterol and is synthesized in the human body.
- **Linoleic Acid**: This is an essential fatty acid that is not synthesized in the human body and must be obtained from food sources.
- **Glycerol**: This is a component of triglycerides and can be synthesized in the body.
- **None of the Above**: This option would imply that all listed fatty acids can be synthesized, which is incorrect.

5. **Conclusion**: Based on the analysis, the fatty acid that is not synthesized in the human body is **Linoleic Acid**.

**Final Answer**: Linoleic acid

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