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': 'Not a feature of Hand- Schuller Christian disease: \nSelect and explain. \nA. Punched out bone destruction., B. Exophthalmos., C. Enopthalmos., D. Diabetes insipidus.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hand-Schuller Christian disease is characterized\xa0classic triad of:\n\nSingle or multiple areas of regular “punched-out”\xa0bone destructions in skull.\nUnilateral or bilateral exopthalmos and\nDiabetes insipidus.\n\nGingivitis, loose and sore teeth with precocious exfoliation\xa0of teeth, failure of healing of sockets, and loss of supporting\xa0alveolar bone mimicking advanced periodontal disease are\xa0important oral manifestations.', 'role': 'assistant'}]