This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Esophageal Motility Disorders, Subject name: Surgery
[{'content': 'Hellers myotomy is used in - \nSelect and explain. \nA. CHPS, B. Ca esophagus, C. Achalasia cardia, D. Hiatus hernia', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Achalasia cardia SurgeryConditionHellers cardiomyotomyAchalasia CardiaNissens fundopicationGERDRamstaedfs pyloromyotomyCongenital hypertrophc pyloric stenosis", 'role': 'assistant'}]