This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
The most essential fatty acid is 
Select and explain. 
A. Linoleic acid, B. Linolenic acid, C. Arachidonic acid, D. Palmitic acid
A: Linoleic acid
Answer: A: Linoleic acid 
Explanation: Linoleic acid 

Linoleic acid is the most important essential fatty acid because it serves as a basis for the production of other EFA like arachidonic acid.