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
Avascular necrosis is the most common in one of the following fracture 
Select and explain. 
A. 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
A: Garden 3 and 4 fracture of femoral neck
Answer: A: Garden 3 and 4 fracture of femoral neck 
Explanation: The Garden classification of subcapital femoral neck fractures is the most widely used. It is simple and.
Garden stage III: complete fracture, incompletely displaced. femoral
Garden stage IV: complete fracture, completely displaced. femoral