This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
[{'content': 'Best chemical disinfectant to disinfect stethoscope: \nSelect and explain. \nA. Isopropyl alcohol, B. Ethylene oxide, C. Halogenated compound, D. Plasma sterilization', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Isopropyl alcoholMedical devices require disinfection as per Spaulding criteria of criticality according to degree of risk for infection involved in use of these items. Stethoscope is a non-critical device requiring intermediate-low level disinfectant. Isopropyl alcohol can be routinely used for disinfection of stethoscope.', 'role': 'assistant'}]