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: Pathology
[{'content': 'PAS stains the following, except: \nSelect and explain. \nA. Glycogen, B. Lipids, C. Fungal cell wall, D. Basement membrane of bacteria', 'role': 'user'}, {'content': 'Answer: D \nExplanation: . Basement membrane of bacteria', 'role': 'assistant'}]