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
Acetyl COA is produced from which fuel sources 
Select and explain. 
A. Carbohydrate, B. Lipid, C. Amino acids, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None