<prompt> Following are radiological evidence of Achalasia cardia ExceptBeak like appearanceDilated touous esophagusPresence of air-fluid levelExaggerated peristalsis  <response>: Achalasia is a rare disease caused by loss of ganglion cells within the esophageal myenteric plexus.The barium swallow x-ray appearance is of a dilated esophagus with poor emptying, an air-fluid level, and tapering at the LES giving it a beak-like appearance.Ref: Harrison;s Principles of Internal Medicine; 19th edition; Chapter 347 Diseases of the Esophagus; Page no: 1904 