This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastro Intestinal System, Subject name: Pediatrics
A one day old baby presents with excessive frothing from mouth and baby was cyanosed: 
Select and explain. 
A. Esophageal atresia, B. Diaphragmatic hernia, C. Congenital lung cyst, D. Lung hypoplasia
A: Esophageal atresia
Answer: A: Esophageal atresia 
Explanation: a. Esophageal atresia(Ref: Nelson's 20/e p 1783, Ghai 8/e p 176)Congenital diseaseMode of presentationCong diaphragmatic herniaNew born with cyanosis, respiratory distress, shift of mediastinum and scaphoid abdomenBilateral choanal atresiaNew born with feeding difficulty, cyanosis on closing mouth, which disappears on cryingPure esophageal atresiaNeonate with frothing and bubbling at mouth and nose, with coughing, cyanosis and respiratory distress; X-ray shows coiled feeding tube in esophageal pouch and absent gastric air shadow