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': 'Heller&;s myotomy is done for: \nSelect and explain. \nA. Esophageal carcinoma, B. Pyloric hyperophy, C. Achalasia cardia, D. Inguinal hernia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Achalasia is associated with loss of ganglion cells in the esophageal myenteric plexus. These impoant inhibitory neurons induce LES relaxation and coordinate proximal-to-distal peristaltic contraction of the esophagus Achalasia is an esophageal motor disorder characterized by increased lower esophageal sphincter (LES) pressure, diminished-to-absent peristalsis in the distal poion of the esophagus composed of smooth muscle, and lack of a coordinated LES relaxation in response to swallowing. Barium radiology may show &;bird&;s beak&; appearance Ref : Bailey and love surgery text book 27th ed', 'role': 'assistant'}]