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': 'High level disinfectant is \nSelect and explain. \nA. Isopropylalchol, B. Phenol, C. Benzalkonium chloride, D. Chlorine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Low – Level distinfectant\xa0–\xa0Benzalkonium chloride\nIntermediate –\xa0Level distinfectant –\xa0Isopropylalchol,phenol\nHigh –\xa0Level disinfectant –\xa0Gluteraldelyde, formaldehyde, H2O2, Chlorine', 'role': 'assistant'}]