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
In which of the following metabolic pathways does HMG-CoA acts as anintermediate? 
Select and explain. 
A. Cholesterol synthesis, B. Ketone body synthesis, C. Leucine catabolism, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: HMG CoA is an intermediate in the all 3 metabolic pathways.