This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Social & Preventive Medicine
Anthracosis is caused by; 
Select and explain. 
A. Silica, B. Asbestos, C. Coal dust, D. Sugar cane waste
C: Coal dust
Answer: C: Coal dust 
Explanation: Anthracosis is caused by Coal dust. There are two general phases in Anthracosis The first phase is simple pneumoconiosis which is associated with little ventilatory impairment. The second phase is characterised by progressive massive fibrosis (PMF); this causes severe respiratory disability and frequently results in premature death.