<prompt> Proximal muscle weakness is not a feature ofPolymyositisMyotonic dystrophyBeckers muscular dystrophyDuchenes muscular dystrophy  <response>: In Myotonic dystrophy the Muscles affected are Faceincluding ptosis, sternocleidomastoids, distal limb, generalised later. In all other above mentioned options the proximal muscles are affected. Reference : Harrison20th edition pg 2278 