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: Medicine
[{'content': 'Sarcoidosis - \nSelect and explain. \nA. Is associated with HLA B1, B. Is commoner in elderly people, C. Causes caseating granuloma, D. Produces bilateral hilar lymphadenopathies in the absence of pulmonary symptoms', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]