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': 'Following are radiological evidence of Achalasia cardia except - \nSelect and explain. \nA. Smooth narrowing of esophagus, B. Dilated tortous esophagus, C. Absence of air in the fundus, D. Exaggerated peristalsis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]