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': 'Which muscle is relatively spared in facioscapulo humeral muscular dystrophy? \nSelect and explain. \nA. Deltoid, B. Biceps, C. Triceps, D. Orbicularis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: * The disease involves slowly progressive weakness of muscles of face,shoulder girdle,scapular and foot dorsiflexion. Ref Harrison20th edition pg 2234', 'role': 'assistant'}]