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: Surgery
A neonate with a scaphoid abdomen and respiratory distress has - 
Select and explain. 
A. Congenital pyloric stenosis, B. Diaphragmatic hernia, C. Volvulus, D. Wilm's tumor
B: Diaphragmatic hernia
Answer: B: Diaphragmatic hernia 
Explanation: In congenital 'aphragmatic hernia, there is herniation of intraabdominal contents into the chest. It is also associated with pulmonary hypoplasia and pulmonary hypertension.
The infant presents with respiratory distress and a scaphoid abdomen.
Those with large defects are symptomatic in the delivery room, with tachypnea, grunting respirations, retractions and cyanosis. Those with smaller defects, symptoms may appear months later.