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': 'Which of the following is immediate precursor of acetoacetate during ketone body synthesis \nSelect and explain. \nA. Acetone, B. Malonyl CoA, C. HMG CoA, D. Acetoacetyl CoA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]