A fatty acid not synthesized in man is:

Options

A. Oleic
B. Linoleic
C. Palmitic
D. Stearic

Answer

To determine which fatty acid is not synthesized in humans, we need to analyze the options provided in the question. Here’s a step-by-step solution:

### Step 1: Understand Fatty Acids
Fatty acids are carboxylic acids with long hydrocarbon chains. They can be saturated (no double bonds) or unsaturated (one or more double bonds). Humans can synthesize certain fatty acids, but some must be obtained from the diet.

### Step 2: Identify Common Fatty Acids
The common fatty acids include:
- **Oleic Acid**: An 18-carbon monounsaturated fatty acid that is synthesized by humans.
- **Palmitic Acid**: A 16-carbon saturated fatty acid that is also synthesized by humans.
- **Stearic Acid**: An 18-carbon saturated fatty acid that can be synthesized by humans.
- **Linoleic Acid**: An 18-carbon polyunsaturated fatty acid that is essential and cannot be synthesized by humans.

### Step 3: Determine Which Fatty Acid is Not Synthesized
Among the fatty acids mentioned:
- Oleic acid, palmitic acid, and stearic acid can all be synthesized by the human body.
- Linoleic acid, however, is essential and must be obtained through the diet as humans cannot synthesize it.

### Conclusion
The fatty acid that is not synthesized in humans is **Linoleic Acid**.

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