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: Radiology
[{'content': "Pathognomic feature of hyperparathyroidism: \nSelect and explain. \nA. Pathognomic feature of hyperparathyroidism:, B. Loss of Lamina dura, C. Brown's tumor, D. Sub periosteal resoption of phalynges", 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Subperiosteal resorption of bone (phalynges) Very interestingQ friends as all the options are the features of hyperparathyroidism but they are asking about the hallmark or characteristic feature which is ? Subperiosteal Erosion of bone, paicularly radial aspect of middle phalynx of middle & index finger.Q', 'role': 'assistant'}]