<prompt> Which is not a content of tympanic cavity :MaleusChorda tympaniStapediusPost. auricular N  <response>: Contents of middle ear or tympanic cavity are auditory ossicles malleus, incus, and stapes, stapedius tensor tympani muscles, chorda tympani nerve0 a branch of 70 cranial nerve and tympanic plexus of nerves. 