This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'The inferior most structure of right hilum is \nSelect and explain. \nA. Right atrium, B. Inferior pulmonary vein, C. Pulmonary aery, D. Inferior bronchial vein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The inferior most structure of right hilum is inferior pulmonary vein. The sequence of structures at the right hilum superior to inferior is: Superior lobar (epaerial) bronchus. Pulmonary aery Principal bronchus Inferior pulmonary vein Ref: Gray&;s Anatomy 41st edition Pgno: 958', 'role': 'assistant'}]