This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin, Bones and Joints, Subject name: Pathology
[{'content': 'Chondroblastoma most commonly occurs in: \nSelect and explain. \nA. Metaphysis, B. Diaphysis, C. Epiphysis, D. Medullary cavity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]