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': "Which of the following is not a premalignant condition: September 2011 \nSelect and explain. \nA. Barrett's esophagus, B. Hiatus hernia, C. Achalasia, D. Plummer Vinson syndrome", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Hiatus hernia', 'role': 'assistant'}]