This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'The hilum of the right lung is arched by - \nSelect and explain. \nA. Recurrent laryngeal nerve, B. Azygos vein, C. Thoracic duct, D. Vagus nerve', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hilum of lung arched by\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Right side- Azygos vein\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Left side- Arch of aorta', 'role': 'assistant'}]