<prompt> Answer this question truthfullyWhat classification does Achalasia fall under?  <response>: <reason> Type I achalasia is associated with no evidence of esophageal pressurization. Integrated relaxation pressure IRP10 mmHg distinguishes type 1 achalasia from absent peristalsis. Type II achalasia is associated with esophageal compression panesophageal pressurization. This type of achalasia is most likely to respond to therapy.Type III achalasia is associated with 2 or more spastic contractions spastic achalasia. IRP17 mmHg distinguishes type III achalasia from difuse esophageal spasm. It carries a negative predictive response to therapy. 