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: ENT
[{'content': 'The commonest type of tracheoesophageal anomaly is - \nSelect and explain. \nA. Esophageal atresia without tracheoesophageal fistula, B. Esophageal atresia with distal tracheoesophageal fistula, C. Esophageal atresia with proximal tracheoesophageal fistula, D. Tracheoesophageal fistula without esophageal atresia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tracheoesophageal fistula and esophageal atresia\n\nEsophageal atresia is the most common congenital anomaly of the esophagus.\nMore than 90% are associated with tracheoesophageal fistula.\nThe most common variety is the one where upper part of esophagus ends blindly and the lower part is connected to trachea-by a fistula.\nTEF should be suspected in all cases of hydramnios.\nThere may be associated anomalies → VACTERL (vertebral, anorectal, cardiac, tracheal, esophageal, renal, radial, limb) syndrome.\n\nPresentations\n\nFrothing and bubbling at the mouth and nose.\nCoughing, cyanosis and respiratory distress.\nFeeding exacerbates these symptoms, causes regurgitation, and may precipitate aspiration.\nAspiration of gastric contents via distal fistula can cause aspiration pneumonitis.', 'role': 'assistant'}]