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': 'Eosinophilic granuloma results from the proliferation of \nSelect and explain. \nA. Histiocytes, B. eosinophils, C. Lymphocytes, D. fibroblast', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]