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': 'Composition of ZN stain are all EXCEPT? \nSelect and explain. \nA. Basic fuschin, B. Acid fuschin, C. Phenol, D. Alcohol', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Acid fuschin Reagents required in Ziehl-Neelsen (ZN) stainingCarbol fuchsin - Strong Carbol fuchsin is basic fuchsin dissolved in phenol (Carbolic acid).Acid alcohol (or sulfuric acid).Methylene blue (or malachite green).", 'role': 'assistant'}]