<prompt> Cork screw appearance on barium swallow is seen in:Achalasia cardiaDiffuse esophageal spasmZenkers diverticulumScleroderma  <response>: Ans. b Diffuse esophageal spasmRef: SRB Manual of Surgery 4th ed. 1323 Cork screw appearance on barium swallow is seen with diffuse esophageal spasm. Bird beak appearance is seen with achalasia cardia. Rat tail appearance as per bailey and love is seen with carcinoma esophagus. 