<prompt> A neonate with Down syndrome is having bilious vomitingDuodenal atresiaCongenital hypertrophic pyloric stenosisIleal atresiaAnorectal malformation  <response>: Ans. a Duodenal atresia Ref - The image shows the presence of double bubble appearance suggestive of diagnosis of duodenal atresia. About 8 of children with Down syndrome are born with duodenal atresia which presents with bilious vomiting. 