This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Beta oxidation of fatty acids, Subject name: Biochemistry
[{'content': 'Immediate precursor of acetoacetate: \nSelect and explain. \nA. HMG CoA, B. Acetoacetyl CoA, C. Acetyl CoA, D. Malonyl CoA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Immediate precursor of acetoacetate (ketone body) is HMG CoA, not Acetoacetyl CoA. Ketone body synthesis', 'role': 'assistant'}]