Choose a saturated fatty acid from the following compounds.

Options

A. Palmitic acid
B. Linoleic acid
C. Oleic acid
D. Arachidonic acid

Answer

To solve the question of identifying a saturated fatty acid from the given options, we will analyze each compound based on their structural characteristics, specifically looking for the presence or absence of double bonds.

### Step-by-Step Solution:

1. **Understanding Saturated vs. Unsaturated Fatty Acids**:
- Saturated fatty acids do not contain any double bonds between carbon atoms in their hydrocarbon chain.
- Unsaturated fatty acids contain one or more double bonds in their structure.

2. **Analyzing the Options**:
- **Option 1: Palmitic Acid**
- Formula: C16H32O2
- Structure: Palmitic acid has a straight-chain structure with no double bonds.
- Conclusion: **Palmitic acid is a saturated fatty acid.**

- **Option 2: Linoleic Acid**
- Formula: C18H32O2
- Structure: Linoleic acid contains two double bonds (at the cis-9 and cis-12 positions).
- Conclusion: **Linoleic acid is an unsaturated fatty acid.**

- **Option 3: Oleic Acid**
- Formula: C18H34O2
- Structure: Oleic acid has one double bond (at the cis-9 position).
- Conclusion: **Oleic acid is an unsaturated fatty acid.**

- **Option 4: Arachidonic Acid**
- Formula: C20H32O2
- Structure: Arachidonic acid contains four double bonds (at the 5, 8, 11, and 14 positions).
- Conclusion: **Arachidonic acid is an unsaturated fatty acid.**

3. **Final Conclusion**:
- Among the given options, only **Palmitic Acid** is a saturated fatty acid. The other three options (Linoleic Acid, Oleic Acid, and Arachidonic Acid) are all unsaturated fatty acids.

### Answer:
**Palmitic Acid** is the saturated fatty acid from the given options.