<prompt> Most common cause of Acute Intestinal Obstruction in neonatal small bowel obstructionJejunal atresiaMalrotationDuodenal atresiaAcute Intussusception  <response>: Duodenal atresia:occurs at the point of fusion between foregut and midgut .Diagnosis can be made antenatally charecteristic double bubble apperance in ultrasonography.the child vomits at bih and it is bile stained.35 of all atresia. Jejunal atresia15of all atresia:early distension is lacking,but vomiting occurs early.Apple peel atresia with loss of symmetry is seen. Ref : BAILEY AND LOVE;S SHO PRACTICE OF SURGERY,PG NO:1198, 24 th edition 