Which of the following fatty acids is an essential fatty acid?Multiple ChoiceStearic acidOleic acidPalmitic acidAlpha-linolenic acid

1. Break Down the Problem

We need to identify which of the given fatty acids is classified as an essential fatty acid. The options are:

1. Stearic acid
2. Oleic acid
3. Palmitic acid
4. Alpha-linolenic acid

2. Relevant Concepts

Essential fatty acids are fatty acids that cannot be synthesized by the human body and must be obtained through the diet. The two main types are:

• Omega-3 fatty acids (e.g., Alpha-linolenic acid)
• Omega-6 fatty acids (e.g., Linoleic acid)

3. Analysis and Detail

• Stearic acid: A saturated fatty acid that is not essential.
• Oleic acid: A monounsaturated fatty acid and is also not considered essential as the body can produce it.
• Palmitic acid: Another saturated fatty acid, not classified as essential.
• Alpha-linolenic acid: This is an omega-3 fatty acid and is classified as an essential fatty acid because it can't be made by the body.

4. Verify and Summarize

From the analysis, it is clear that the only essential fatty acid listed among the options is Alpha-linolenic acid.

Final Answer

Alpha-linolenic acid is the essential fatty acid among the choices provided.