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: Surgery
[{'content': "Brown's tumour is seen in: \nSelect and explain. \nA. Hypehyroidism, B. Hyperparathyroidism, C. Osteoporosis, D. Osteogenesis imperfecta", 'role': 'user'}, {'content': "Answer: B \nExplanation: Advanced primary hyperparathyroidism pathognomonic radiologic findings, which are best seen on x-rays of the hands and are characterized by subperiosteal resorption. The skull also may be affected and appears mottled with a loss of definition of the inner and outer coices. Brown or osteoclastic tumors and bone cysts also may be present. Ref: Schwaz's principle of surgery 9th edition, chapter 38.", 'role': 'assistant'}]