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A 14-month-old boy who was failing to thrive, was evaluated for complaints of recurrent episodes of non-bilious vomiting. Past history was uneventful and examination showed striking visible gastric peristalsis. Upper gastrointestinal barium series showed deformed pyloroduodenal complex with narrowing (figure A) and endoscopy images are shown below. What is the diagnostic possibility in this scenario?

A) Pyloric stenosis

B) Duodenal web

C) Malrotation

D) Antral web