ENT Ear d522a1aa The nerve supply of middle ear A Tympanic plexus B Facial nerve C Glossopharyngeal nerve D Trigeminal nerve High-Yield Explanation 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.