Which of the following is not a derivative of the middle ear cleft-
Semicircular canal
Mastoid aircell
Tympanic cavity
Eustachian tube
Ans. is 'a' i.e., Semicircular canal o The middle - ear cleft in the temporal bone includesEustachian tubeThe middle ear (tympanic cavity)Aditus wrhich leads posteriorly to the mastoid antrum and air cells.
Anatomy of Middle Ear (Otitis Media)