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': 'Acetyl Co-A acts as a substrate for all the enzymes except a) HMG-Co A synthetaseb) Malic enzymec)  Malonyl CoA synthetased)  Fatty acid synthetase \nSelect and explain. \nA. ac, B. bc, C. abc, D. d', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]