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: Surgery
[{'content': '72 year old patient it comes with esophageal carcinoma in lower oesophagus. There are no distant metastasis and lymph node involvement. What is the preferred surgery \nSelect and explain. \nA. Transhiatal esophagectomy, B. Ivor Lewis esophagectomy, C. Endoscopic resection, D. McKeown esophagectomy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]