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': 'Disinfectant working by causing plasma membrane damage is: \nSelect and explain. \nA. Ammonium compounds, B. HC1, C. Alcohol, D. Halogenated compounds', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ammonium compounds', 'role': 'assistant'}]