<prompt> Arch of aorta develops from:Right 4th aortic archLeft 4th aortic archRight 6th aortic archLeft 6th aortic arch  <response>: 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 