<prompt> Stapes develop from -1st arch2nd arch3rd arch4th arch  <response>: Ans. is b i.e., 2nd archo External auditary canal - First branchial cleft.o Auricle pinna - First second branchial pharyngeal arch.o Middle ear cleft Eustachian tube, tympanic cavity, attic, antrum, mastoid air cells - 1st 2nd arch,o Malleus, incus - 1st arch,o Stapes except footplate - 2nd arch,o Footplate of stapes and annular ligament - Otic capsule. 