<prompt> Heller myotomy is done for:Pyloric stenosisHirschsprungAchalasiaDES  <response>: Ans. c AchalasiaRef Bailey 26th edition 1010 Modified Heller cardiomyotomy: Achalasia cardia Ramstaeds pyloromyotomy: Pyloric stenosis Congenital Duhamel operation: Hirschsprung disease 