Which of the following is not one of the Cs found with feeding attempts in infants with tracheoesophageal fistula?

Choice A reason: Cyanosis is a hallmark sign during feeding in infants with tracheoesophageal fistula (TEF). It occurs due to aspiration of milk into the trachea, leading to hypoxia. The abnormal connection between the trachea and esophagus allows food to enter the airway, compromising oxygenation. Choice B reason: Choking is a classic symptom of TEF during feeding. The infant struggles to swallow properly due to the disrupted anatomy, leading to aspiration and choking episodes. This is one of the primary signs that prompt further evaluation. Choice C reason: Choanal atresia is a congenital condition involving blockage of the nasal passages, unrelated to TEF. It is not one of the "Cs" associated with feeding difficulties in TEF. Including it in this context is incorrect, as it pertains to a different anatomical defect and clinical presentation. Choice D reason: Coughing is another key symptom during feeding in infants with TEF. It results from aspiration and irritation of the airway due to the abnormal communication between the trachea and esophagus. This symptom, along with cyanosis and choking, forms the classic triad of TEF feeding complications.