This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Syringes and can be eliminated by? \nSelect and explain. \nA. 0.1 per 1000, B. 10 per 1000, C. 1000 per 1000, D. 1 per 1000', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]