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: Anatomy
[{'content': 'Avascular necrosis may be seen in 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 dislocation*Other sites of common AVN are Distal medial condyle, Humeral head, Capitellum, and Metatarsal heads*In 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, pg no: 91-103, 436-439)", 'role': 'assistant'}]