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: Social & Preventive Medicine
[{'content': 'Disinfection of sputum is done by -a)  Boilingb)  Autoclavingc)  Sunlightd)  Burninge)  Airing \nSelect and explain. \nA. ae, B. edb, C. abd, D. bd', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]