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
Wheelchair sign is seen in? 
Select and explain. 
A. Parkinsonism, B. Duchenne muscular dystrophy, C. Becker's dystrophy, D. Thomsen disease
A: Parkinsonism
Answer: A: Parkinsonism 
Explanation: 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.