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': 'A fatty acid that is not synthesized in man is: \nSelect and explain. \nA. Linoleic acid, B. Oleic acid, C. Palmitic acid, D. Stearic acid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]