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: Orthopaedics
[{'content': 'The differential diagnosis of the lesion, histologically resembling giant cell tumour in the small bones of the hands or feet, includes all of the following except \nSelect and explain. \nA. Aneurysmal bone cyst, B. Fibrosarcoma, C. Osteosarcoma, D. Hyperparathyroidism', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The histological differential diagnosis for GCT include all giant cell-containing lesions.', 'role': 'assistant'}]