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: Unknown
[{'content': 'Heller’s cardiomyotomy done for: \nSelect and explain. \nA. CHPS, B. Achalasia, C. GERD, D. Duodenal stenosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref. API Textbook of Medicine. Pg. 1099\n\xa0\nManagement of achlasia cardia\n\n1st line: calcium channel blockers\n2 nd line: Pneumatic dilatation\n3rd line: surgery -Hellers cardiomyotomy - it involves cutting the lower oesophgus and cardia.\nThe major complication is Gastroesophageal reflux and therefore additional Partial anterior fundoplication is done H(ellers -Dorr operation)\nBotulinum toxin injection is used in recurrent cases of achalasia cardia', 'role': 'assistant'}]