Arch of aorta develops from:: (A) Right 4th aortic arch, (B) Left 4th aortic arch, (C) Right 6th aortic arch, (D) Left 6th aortic arch
Answer is B. Ans. B. Left 4th aortic archThe aortic arch is the connection between the ascending and descending aorta, and its central part is formed by the left 4th aortic arch during early development