This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Double bubble sign in children seen in A/E – 
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 part of duodenum cause double bubble sign on plain abdominal radiograph. OIt may be due to -

i)  Annular pancreas
ii) Pancreatic pseudocyst
iii) Ladds band                         
iv) Tumor in the head of the pancrease