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: Microbiology
[{'content': "Nocardia is stained by all except - \nSelect and explain. \nA. Acid fast stain, B. Kiram's stain, C. Alcian blue stain, D. Mucin stain", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]