This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'what is the diagnosis of following Barium Xray? \nSelect and explain. \nA. Achalasia Cornelia, B. ca. esophagus, C. Plummer winson Syndrome., D. GERD', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : bailey and love 27th ed', 'role': 'assistant'}]