<prompt> Common carotid aery is formed by?2nd aoic arch3rd aoic arch4th aoic arch6th aoic arch  <response>: 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 