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: Radiology
[{'content': 'Egg - Shell calcification of lymphnodes is suggestive of \nSelect and explain. \nA. Asbestosis, B. Berylliosis, C. Stannosis, D. Coal worker pneumoconiosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Silicosis & Coalworker Pneumoconiosis are important cause.', 'role': 'assistant'}]