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': 'Structures passing through the aortic hiatus of diaphragm area) Aortab) Azygos veinc) Hemiazygos veind) Thoracic ducte) Sympathetic trunk \nSelect and explain. \nA. acd, B. abd, C. abc, D. ab', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Aortic opening\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Level- T12\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 At osseoaponeurosis between right and left crus\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Structures transmitted\n\n\xa0 \xa0Aorta\n\xa0 \xa0Thoracic duct\n\xa0 \xa0Azygos vein', 'role': 'assistant'}]