This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Surgery
All are manometric features of achalasia except: 
Select and explain. 
A. High LES pressure, B. Decreased LES relaxation, C. Segmental body peristalsis, D. Manometry helps in diagnosis
C: Segmental body peristalsis
Answer: C: Segmental body peristalsis 
Explanation: Ans. (c) Segmental body peristalsisRef: Sabiston 20th Edition, Pages 1015-1018Manometry findings in Achalasia:* LES will be hypertensive* LES fails to relax with deglutition* Body of esophagus has increased pressure* No evidence of progressive peristalsisLow amplitude wave forms