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
Hellers myotomy is used in - 
Select and explain. 
A. CHPS, B. Ca esophagus, C. Achalasia cardia, D. Hiatus hernia
C: Achalasia cardia
Answer: C: Achalasia cardia 
Explanation: Ans. is 'c' i.e., Achalasia cardia SurgeryConditionHellers cardiomyotomyAchalasia CardiaNissens fundopicationGERDRamstaedfs pyloromyotomyCongenital hypertrophc pyloric stenosis