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': 'PAN-SH site of fatty acid synthase complex accepts: \nSelect and explain. \nA. Acetyl CoA, B. Malonyl CoA, C. Propionyl CoA, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Malonyl CoA', 'role': 'assistant'}]