<prompt> Most common cause ofAcute Intestinal Obstruction in neonates is -Jejuna! atresiaMalrotationDuodenal atresiaAcute Intussusception  <response>: Ans. is c i.e., Duodenal atresiao Most common cause of neonatal intestinal obstruction Meconium plug syndrome.o Second most common cause of neonatal intestinal obstruction Duodenal atresia.Impoant causes of intestinal obstruction in newbornMeconium plug syndrome o Duodenal atresia o Jujunoileal atresiaMalrotation of gut o Meconium ileusMeconium plug syndrome -- when meconium plug causes obstruction of colon. It is seen in Hirschsprung disease, maternal DM, maternal preeclampsia, prematurity, sepsis, hypothyroidism.Meconium Ileus -- when meconium plug obstruct ileum. It is seen in cystic fibrosis.Note ?o Intussusception is the most common cause of intestinal obstruction between 3 months and 6 year of age not in neonate. 