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': 'All muscles of pharynx are supplied by pharyngeal plexus except - \nSelect and explain. \nA. Palatopharyngngeus, B. Stylopharyngeus, C. Salpingopharyngeus, D. Superior constrictor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: All muscles of pharynx are supplied by cranial accessory through branches of vagus pharyngeal plexus except stylopharyngeus which is supplied by glossopharyngeal. The inferior constrictor receives an additional supply from the external and recurrent laryngeal nerves.', 'role': 'assistant'}]