This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
[{'content': 'X-ray features of hypoparathyroidism are the following except - \nSelect and explain. \nA. Osteosclerosis, B. Calvarial thickening, C. Subperiosteal resorption, D. Subcutaneous calcification', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Subperiosteal resorption is the characteristic feature of hyperparathyroidism. Radiological features of Hypoparathyroidism : Osteosclerosis Calvarial thickening Subcutaneous calcifications Thickened lamina dura', 'role': 'assistant'}]