This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'The nerve supply of middle ear \nSelect and explain. \nA. Tympanic plexus, B. Facial nerve, C. Glossopharyngeal nerve, D. Trigeminal nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tympanic branch supplies innervation to the medial surface of the tympanic membrane,tympanic cavity,mastoid air cells and the bony eustachian tube. Reference- Dhingra 6/e,p 8.', 'role': 'assistant'}]