A newborn boy does not pass meconium until 48 hours after his birth. Several weeks later his mother

A newborn boy does not pass meconium until 48 hours after his birth. Several weeks later his mother complains that he has not passing stool regularly. Anorectal manometry reveals increased on rectal distention with a balloon. The patient’s disorder may be attributed to

A.Defective recanalization of the colon

B.Failure of neural crest cells to migrate into the colonic wall

C.Herniation of abdominal contents into umbilical

D.Persistence of the proximal end of the yolk stalk

E.Presence of a rectourinary fistula

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