This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Avascular necrosis may be seen at all of the following, Except \nSelect and explain. \nA. Scapula, B. Head of femur, C. Upper end of humerus, D. Body of Talus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Common Site of Avascular necrosisCauseHead and femurFracture neck femur (Subcapital)Posterior dislocation of hipProximal pole of scaphoidFracture through waist of scaphoidBody of talusFracture neck of talusProximal pole of lunateLunate dislocationOther sites of common AVN are Distal medial condyle, Humeral head, Capitellum, and Metatarsal headsIn the early stages, bone scintigraphy and MRI are the diagnostic modalities of choice.Non-ohopedic causes of AVN - Sclera, Caisson's disease, Lupus erythematosus, Radiation and Alcohol (Refer: Apley's system of Ohopedics and Fracture, 8th edition,pgno: 91-103, 436-439)", 'role': 'assistant'}]