This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Occupational Health, Subject name: Social & Preventive Medicine
Pneumoconiosis most likely to occur if a person is exposed to particle size range of: 
Select and explain. 
A. 0.5 - 3 im, B. 3-5 im, C. 5-10 im, D. 10-15 im
A: 0.5 - 3 im
Answer: A: 0.5 - 3 im 
Explanation: Ans: a (0.5-3) Ref: Park, 19th ed, p. 661Dust within the range of 0.5- 3 micrometer after a variable period of exposure, produces a type of lung disease known as pneumoconiosis.Important dust diseases include:SilicosisBagassosisAnthracosisAsbestosisByssinosisFarmers lung