<prompt> Commonest cause of colonic obstruction in neonates is -Meconium ileusAganglionic colonHeal atresiaVolvulusd Hernia  <response>: Ans. is b i.e., Aganglionic colon i Option a c are causes of small bowel obstruction not colonic obstruction ii Most common cause of Intestinal obstruction in a neonate is Intestinal atresia - p. 1133, 1232 Nelson 