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: Malonyl - CoA\xa0\n\nCentral thiol or Pan -SH or 4-phosphopantetheine of ACP → \xa0Accepts malonyl group\nPeripheral thiol or cysteine -SH group of 3-ketoacyl synthase \xa0→ Accepts acetyl group', 'role': 'assistant'}]