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
Disinfectant working by causing plasma membrane damage is: 
Select and explain. 
A. Ammonium compounds, B. HC1, C. Alcohol, D. Halogenated compounds
A: Ammonium compounds
Answer: A: Ammonium compounds 
Explanation: Ammonium compounds