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': 'Modified Ziehl-neelsen staining is used for: \nSelect and explain. \nA. Mycobacterium tuberculosis, B. Mycobacterium bovis, C. Nocardia, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is. 'd' i. e., All of the above", 'role': 'assistant'}]