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': 'Egg shell calcification of Hilar Lymphnode is associated with \nSelect and explain. \nA. Silicosis, B. Asbestosis, C. Byssinosis, D. Anthracosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]