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': 'Acetyl CoA is necessary for: \nSelect and explain. \nA. Aminoacid synthesis, B. Fatty acid synthesis, C. Glucose storage, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Fatty acid synthesis', 'role': 'assistant'}]