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': 'All of the following structures pass through aoic opening in the diaphragm, EXCEPT : \nSelect and explain. \nA. Azygos vein, B. Rt. phrenic nerve, C. Thoracic duct, D. Accessory Hemiazygos vein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Azygos vein pass to the right and thoracic duct passes to the left of aoa through its opening in the diaphragm. Accessory hemiazygos vein and hemiazygos veins pass behind the aoa and thoracic duct to join the azygos vein opposite the seventh and eighth thoracic thoracic veebral bodies. Aoic opening in the diaphragm lies at the lower border of body of T12. Oesophageal opening of diaphragm lies at the level of lower border of T10 veebrae. Structures passing through it are: oesophagus, oesophageal branches of left gastric aery, anterior gastric nerve and posterior gastric nerve. Right phrenic nerve passes through the vena caval opening in the diaphragm which lies at level of lower border of T8 veebrae. Ref: A New Approach to Dissection of the Human Body: A Thiy Week Schedule By R. Kanagasuntheram page 71. Anatomy, Combined Edition By S. Mitra page 1-43.', 'role': 'assistant'}]