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': 'Histiocytosis X is seen in except- \nSelect and explain. \nA. Hand schuller Christian disease, B. Eosinophilic granuloma, C. Letterer-siwe syndrome, D. Torres syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]