<prompt> Child at birth presented with respiratory distress and drooling of saliva. Mother has a history of polyhydramnios. What is the initial investigationChest X RayNG tube and CXREndoscopyContrast study  <response>: This is a case of tracheoesophageal fistula. Initial investigation is inserting nasogastric tube and chest X-Ray. Investigation of choice is IOHEXOL contrast study 