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': 'Avascular necrosis is the most common in one of the following fracture \nSelect and explain. \nA. Garden 3 and 4 fracture of femoral neck, B. Garden 1 and 2 fracture of femoral neck, C. Sub-trochanteric fracture of femoral neck, D. Baso-trochanteric fracture', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The Garden classification of subcapital femoral neck fractures is the most widely used. It is simple and.\nGarden stage III: complete fracture, incompletely displaced. femoral\nGarden stage IV: complete fracture, completely displaced. femoral', 'role': 'assistant'}]