Commonest cause of intestinal obstruction in down's syndrome – a) Colomic atresia b)  Intestinal atresiac) Duodenal atresia d)  Oesophageal atresia: (A) a, (B) bc, (C) ac, (D) ad
Answer is B. Most common cause of Intestinal obstruction in Down's syndrome is duodenal atresia.
Duodenal atresia is a type of intestinal atresia.