This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': "Proximal muscle weakness is not a feature of \nSelect and explain. \nA. Polymyositis, B. Myotonic dystrophy, C. Becker's muscular dystrophy, D. Duchene's muscular dystrophy", 'role': 'user'}, {'content': 'Answer: B \nExplanation: In Myotonic dystrophy the Muscles affected are Face(including ptosis), sternocleidomastoids, distal limb, generalised later. In all other above mentioned options the proximal muscles are affected. Reference : Harrison20th edition pg 2278', 'role': 'assistant'}]