This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Radiology
[{'content': 'Cork screw appearance on radiography is seen in- \nSelect and explain. \nA. Achlasia cardia, B. Carcinoma esophagus, C. Hiatus hernia, D. Diffuse esophageal spasm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is \'d\' i.e., Diffuse esophageal spasm * "Cork screw esophagus" on barium study is seen in diffuse esophageal spasm.* In diffuse esophageal spasm, barium swallow shows that normal sequential peristalsis below the aortic arch is replaced by uncourdinated simultaneous contractions that produce the appearance of curling or multiple ripples in the wall, sacculation and pseudodiverticula - the "Corkscrew" esophagus.', 'role': 'assistant'}]