<prompt> A lady presented with non progressive dysphagia only for solids. Barium study showed proximal esophageal dilatation with distal constriction. The most likely diagnosis is.Peptic StrictureCarcinoma EsophagusAchalasia CardiaLower Esophageal Ring  <response>: Answer is D Lower esophageal ring Non progressive episodic dysphagia only for solids is characteristic of lower esophageal rings Schatzkis ring. The ring is apparent as a constriction in the lower esophagus on barium swallow. Peptic stricture and carcinoma esophagus present with progressive dysphagia for solids while Achalasia presents with progressive dysphagia for both solids and liquids. 