Double arch aoa arises from?: (A) Right 6th aoic arch, (B) Left 6th aoic arch, (C) Right 4th aoic arch, (D) Left 4th aoic arch
Answer is D. HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:254 The arch of aoa is derived from the ventral pa of the aoic sac ,its left horn,and the left fouh arch aery