This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology of Ear and Malformations, Subject name: ENT
Stapes develop from - 
Select and explain. 
A. 1st arch, B. 2nd arch, C. 3rd arch, D. 4th arch
B: 2nd arch
Answer: B: 2nd arch 
Explanation: 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.