<prompt> A postnatal X-ray of abdomen of a neonate shows double bubble sign. It is seen with:Pyloric stenosisDuodenal atresiaIleal atresiaEsophageal atresia  <response>: In duodenal atresia, postnatal abdominal plain radiographs show gaseous distention of the stomach and proximal duodenum the double-bubble radiologic sign. With protracted vomiting, there is less air in the stomach and less abdominal distention. Absence of distal intestinal gas suggests atresia or severe extrinsic obstruction, whereas a pattern of intestinal air scattered over the lower abdomen may indicate paial duodenal obstruction. Ref: Sundaram S.S., Hoffenberg E.J., Kramer R.E., Sondheimer J.M., Furuta G.T. 2012. Chapter 21. Gastrointestinal Tract. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer Eds, CURRENT Diagnosis Treatment: Pediatrics, 21e. 