This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy and Physiology of Pharynx, Subject name: ENT
[{'content': 'Glossopharyngeal nerve supplies: \nSelect and explain. \nA. Glossopharyngeus muscle, B. Stylopharyngeus muscle, C. Anterior 2/3 of the tongue, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Stylopharyngeus muscle* Cranial nerve IX (glossopharyngeal nerve) is a mixed nerve that carries afferent sensory and efferent motor information.Functions* Branchial motor: supplies the stylopharyngeus muscle* Visceral motor: provides parasympathetic innervations to the parotid gland* Visceral sensory: carries visceral sensory information from the carotid sinus and carotid body.* General sensory: provides general sensory information from the skin of the external ear internal surface of the tympanic membrane, upper pharynx and the posterior one-third of the tongue.* Special sensory: provides taste sensation from the posterior one-third of the tongue including circumvallate papillae.', 'role': 'assistant'}]