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: Pediatrics
[{'content': 'All of the following are associated with proximal muscle weakness except – \nSelect and explain. \nA. Spinomuscular atrophy, B. Duchenis muscular dystrophy, C. Polymyositis, D. Myotonic dystrophy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The general rule in that :\nMyopathies have proximal muscle weakness.\nNeuropathies have distal muscle weakness.\nMyotonic dystrophy is an exception to this general rule and mainly involves the distal muscles. Also, know\nThe difference between myopathy and muscular dystrophy.\n\nMyopathy\n\nAny skeletal muscle disorder that causes structural changes or functional impairment of muscle. It also includes muscular dystrophies.\n\nMuscular dystrophy\n\nThe muscular dystrophy means an abnormal growth of muscle.\nIt is characterized by -\n\n\nIt is a primary myopathy\xa0\nIt has a genetic basis\xa0\nCourse is progressive\xa0\xa0\xa0\nDegeneration & Death of muscle fibres occur at some stage of the disease\xa0 \xa0 \xa0\xa0\n\n\nSo, muscular dystrophy is a type of myopathy.', 'role': 'assistant'}]