This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Muscles spared during injury to cranial root of accessory nerve \nSelect and explain. \nA. Stylopharyngeus, B. Palatopharyngeus, C. Salpingopharyngeus, D. Cricopharyngeus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All muscles of the pharynx, except stylopharyngeus, are supplied by the pharyngeal plexus', 'role': 'assistant'}]