This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral Nerve & Muscles, Subject name: Medicine
[{'content': 'Primary idiopathic polymyositis does not involve: \nSelect and explain. \nA. Pelvic girdle muscles, B. Neck muscles, C. Ocular muscles, D. Pharyngeal muscle', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' Ocular muscles Muscular involved in polymyositis areIt chiefly involves proximal muscles of the limb girdles.Pharyngeal and respiratory muscles are involved in severe cases.Presence of any of the following factors rule out the diagnosis.Polymyositis:Involvement of extraocular & facial muscles*Rash*Family history of neuromuscular are diseaseHistory of exposure of myotoxic drugs or toxinsEndocrinopathyMuscular dystrophy", 'role': 'assistant'}]