<prompt> A male aged 60 years has foul breath; He regurgitates food that is eaten 3 days ago: Likely diagnosis is:Zenkers diveiculumMeckels diveiculumSclerodermaAchalasia cardia  <response>: An aged patient with symptoms of foul breath regurgitation of food which is eaten 3 days ago, it is a typical presentation of Zenkers diveiculum. Ref: CSDT, 11th Edition, Pages 480, 1330. 