This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CVS Embryology, Subject name: Anatomy
[{'content': 'The left recurrent laryngeal nerve recurs around the \nSelect and explain. \nA. Left primary bronchus, B. left subclan aery, C. Left subclan vein, D. Ductus aeriosus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Early in embryological development, both the right and left recurrent laryngeal nerves hook (recur) around aoic arch 6. The left aoic arch 6 persists as the ductus aeriosus(distal pa) while proximal pa of it forms pulmonary aery. 6TH phyrangeal arch derivatives:- Nerve-reccurent laryngeal nerve Aery- pulmonary aery (and ductus aeriosus) Muscles - all muscles of larynx except cricothyroid.', 'role': 'assistant'}]