This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
Stapedial artery is derived from which aortic arch: 
Select and explain. 
A. 1, B. 2, C. 3, D. 4
B: 2
Answer: B: 2 
Explanation: Ans. B 2Ref: Netter's Atlas of Human Embryology: 2012 ed. pg. 88* There are six pairs of aortic arches which develop in cephalo-caudal direction.* The 5th aortic arch completely disappears whereas 1st and 2nd disappear partially.* The stapedial artery is derived from the 2nd aortic arch.* Inferior alveolar artery is derived from the 1st aortic arch.