This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach and Intestines, Subject name: Pediatrics
Commonest cause of intestinal obstruction in children is: 
Select and explain. 
A. Intussusception, B. Volvulus, C. Hernia, D. Adhesions
A: Intussusception
Answer: A: Intussusception 
Explanation: a. Intussusception(Ref: Nelson's 20/e p 1894-1897', Ghai 8/e p 285-286)Intussusception occurs when a portion of the alimentary tract is telescoped into an adjacent segment.