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': 'Most common site of avascular necrosis amongst the following is - \nSelect and explain. \nA. Medial candyle of femur #, B. Talus #, C. Olecranon #, D. Head of the radius #', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amongst the given options only talus fracture (neck talus fracture) causes AVN.', 'role': 'assistant'}]