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
[{'content': 'Essential fatty acids are all EXCEPT: \nSelect and explain. \nA. Arachidonic acid, B. Linoleic acid, C. Palmitic acid, D. Linolenic acid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Palmitic acid', 'role': 'assistant'}]