When assessing a neonate 1 hour after birth, the nurse observes that the neonate exhibits slight cyanosis when quiet but becomes pink when crying. The nurse is unable to pass a catheter through the...

When assessing a neonate 1 hour after birth, the nurse observes that the neonate exhibits slight cyanosis when quiet but becomes pink when crying. The nurse is unable to pass a catheter through the left nostril. The nurse notifies the pediatrician because the neonate most likely is exhibiting signs and symptoms of which of the following?

1. Esophageal reflux disorder.

2. Unilateral choanal atresia.

3. Respiratory distress syndrome.

4. Tracheoesophageal fistula.