Social & Preventive Medicine Pneumoconiosis most likely to occur if a person is exposed to particle size range of: A 0.5 - 3 im B 3-5 im C 5-10 im D 10-15 im 💡 Explanation Pneumoconiosis most likely to occur if a person is exposed to particle size range of: ✓ Correct Answer: A. 0.5 - 3 im