This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic disorders - 1, Subject name: Orthopaedics
[{'content': 'Which of the following finding is not seen in this condition? \nSelect and explain. \nA. Osteopenia, B. Renal stones, C. Punched out lesion of skull, D. Brown tumour', 'role': 'user'}, {'content': "Answer: C \nExplanation: Above condition is hyperparathyroidism, Image showing Brown tumor Punched out lesion of skull is not seen in hyperparathyroidism it's a feature of Multiple myeloma Salt pepper skull is a feature of hyperparathyroidism", 'role': 'assistant'}]