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: Pathology
[{'content': 'Anthracosis is due to inhalation of \nSelect and explain. \nA. Coal dust, B. Asbestos dust, C. Silica dust, D. Beryllium dust', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]