This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': "Egg shell calcifiaction of the hilar nodes is seen in- \nSelect and explain. \nA. Asbestosis, B. Berylliosis, C. Silicosis, D. Coal worker's pneumoconiosis", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Eggshell calcification is a radiographic term describing abnormal hilar or mediastinal lymph nodes. According to Fraser and Pare, "Eggshell calcification is uncommon; it consists of a ring of calcification around the periphery of a lymph node and occurs most typically in silicosis. Ref Davidson 23rd edition pg 599', 'role': 'assistant'}]