This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal infections, Subject name: Anatomy
[{'content': 'Earlier site of bone involvement in Hematogenous osteomyelitis \nSelect and explain. \nA. Metaphysis, B. Diaphysis, C. Epiphysis, D. Point of entry of nutrient aery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Metaphysis of long bone is the earliest and most common site involved Refer Maheshwari 6th/e p 168', 'role': 'assistant'}]