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: B i.e. Azygous vein', 'role': 'assistant'}]