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
Respirable dust for pneumoconiosis 
Select and explain. 
A. 0.1–5 m, B. 5–10 m, C. 10–15 m, D. 15–20 m
A: 0.1–5 m
Answer: A: 0.1–5 m 
Explanation: None