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
Which of the following is immediate precursor of acetoacetate during ketone body synthesis 
Select and explain. 
A. Acetone, B. Malonyl CoA, C. HMG CoA, D. Acetoacetyl CoA
C: HMG CoA
Answer: C: HMG CoA 
Explanation: None