This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
[{'content': 'Cytotoxic and expired drug disposal is done by which method? \nSelect and explain. \nA. Dumping, B. Autoclave, C. Landfill, D. Burning', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]