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': 'Which of the following is not a tributary of azygos vein? \nSelect and explain. \nA. Right posterior intercostal, B. Right superior intercostal, C. Left superior intercostal, D. Accessory hemiazygos', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tributaries of Azygos vein\n\nRight superior intercostal vein\nRight posterior intercostal veins (5 to 11)\nHemiazygos vein\nAccessory hemiazygos vein\nRight bronchial vein\nEsophageal, mediastinal and pericardial veins.', 'role': 'assistant'}]