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
The ductus aeriosus is derived from the following aoic arch 
Select and explain. 
A. 3rd, B. 4th, C. 5th, D. 6th
D: 6th
Answer: D: 6th 
Explanation: The pa of the left sixth arch aery, between the branch to the lung bud and aoa,forms the ductus aeriosus HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:255