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
Syringes and can be eliminated by? 
Select and explain. 
A. 0.1 per 1000, B. 10 per 1000, C. 1000 per 1000, D. 1 per 1000
A: 0.1 per 1000
Answer: A: 0.1 per 1000 
Explanation: .