This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Sputum can be disinfected by \nSelect and explain. \nA. Autoclave, B. Boiling, C. Cresol, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sputum can be disinfected by all the above-mentioned methods Ref: Textbook of Microbiology Baveja 5th ed Pg 29', 'role': 'assistant'}]