A lady presented with non progressive dysphagia only for solids. Barium study showed proximal esophageal dilatation with distal constriction. The most likely diagnosis is.

Answer is D (Lower esophageal ring) Non progressive (episodic) dysphagia only for solids is characteristic of lower esophageal rings (Schatzki's 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.