This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parkinsonism and other movement disorders, Subject name: Medicine
[{'content': "Wheelchair sign is seen in? \nSelect and explain. \nA. Parkinsonism, B. Duchenne muscular dystrophy, C. Becker's dystrophy, D. Thomsen disease", 'role': 'user'}, {'content': 'Answer: A \nExplanation: PARKINSON DISEASE Usage of Levodopa leads to "on and off phenomenon". When levodopa stas acting a rigid akinetic wheelchair bound Parkinsonism patient will be in a position to get out of a chair and sta pushing the wheelchair. When the effect wears off the same patient will be restricted to a wheelchair. This is known as wheelchair sign.', 'role': 'assistant'}]