This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Gastrointestinal System Including Diarrhea, Subject name: Pediatrics
Double bubble sign in children is seen in all EXCEPT: 
Select and explain. 
A. Ladds band, B. Annular pancreas, C. Pancreatic pseudocyst, D. Diaphragmatic hernia
D: Diaphragmatic hernia
Answer: D: Diaphragmatic hernia 
Explanation: * Obstruction of 2nd pa of duodenum cause 'double bubble' sign on plain abdominal radiograph * It may be due to- Annular pancreas, Pancreatic pseudocyst, Ladds band & tumor in head of pancreas.