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': 'All are true of arhalasia cardia except- \nSelect and explain. \nA. Dysphagia, B. Aspiration pnemonitis, C. Mecholyl test is hyposensitive, D. X-ray finding of dilated esophagus with a narrow end', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]