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: Surgery
[{'content': 'Earliest site of bone involvement in hematogenous osteomyelitis: \nSelect and explain. \nA. Metaphysis, B. Diaphysis, C. Epiphysis, D. Point of entry of the nutrient aery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Metaphysis Repeatfrom Nov 10', 'role': 'assistant'}]