This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax- wall and Bronchopulmonary segment, Subject name: Anatomy
[{'content': 'True about hemiazygos vein are all EXCEPT: \nSelect and explain. \nA. Formed by right lumbar azygos and right ascending lumbar veins, B. Pierces left crus of diaphragm, C. Drains esophageal vein, D. At T8 level drains into azygos vein', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hemiazygos vein is formed by the confluence of the left ascending lumbar and left subcostal vein. It pierces left crus of diaphragm. Some pa of abdominal pa of abdominal esophagus drain into hemiazygous vein. At T8 level drain into azygous vein.', 'role': 'assistant'}]