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 Co-A acts as a substrate for all the enzymes except a) HMG-Co A synthetaseb) Malic enzymec)  Malonyl CoA synthetased)  Fatty acid synthetase 
Select and explain. 
A. ac, B. bc, C. abc, D. d
B: bc
Answer: B: bc 
Explanation: None