<prompt> A patient complaints of dysphagia, bad breath with regurgitation of food he had three day ago. Most likely cause is:Cancer esophagusZenkers diverticulumCorrosive esophagusDES  <response>: Ans. b Zenker diverticulumRef Sabiston 20th Edition, Page 1022 Zenkers Diverticulum: Most common symptom is dysphagia It is also associated with Halitosis and Regurgitation. Due to stagnation of food in the diverticulum patient may regurgitate after long period. Treatment is Diverticulectomy or Dohlman operation 