Proximal muscle weakness is not a feature of: (A) Polymyositis, (B) Myotonic dystrophy, (C) Becker's muscular dystrophy, (D) Duchene's muscular dystrophy
Answer is B. 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