This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Common carotid aery is formed by? 
Select and explain. 
A. 2nd aoic arch, B. 3rd aoic arch, C. 4th aoic arch, D. 6th aoic arch
B: 3rd aoic arch
Answer: B: 3rd aoic arch 
Explanation: HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:254 The common carotid aery is derived,on either side,from pa of the third arch aery,proximal to the external carotid bud.the internal carotid aery is formed by the poion of the third arch aery distal to the bud,along with the original dorsal aoa cranial to the attachment of the third arch aery