All of the following are associated with proximal muscle weakness EXCEPT: -: (A) Spinomuscular atrophy, (B) Duchenis muscular dystrophy, (C) Polymyositis, (D) Myotonic dystrophy
Answer is D. Ans. is 'd' is myotonic dystrophy The general rule in that:Myopathies have proximal muscle weakness.neuropathies have distal muscle weakness.Myotonic dystrophy is an exception to this general rule and mainly involves the distal muscles.