Which immediate intervention should the practical nurse (PN) implement?

The correct answer is B: Suction the oral and nasal passages. This intervention is crucial to maintain a clear airway for the infant, especially in emergency situations where there may be a risk of airway obstruction. Suctioning helps to remove any secretions or foreign objects that could compromise the infant's breathing. Turning the infant onto the right side (choice A) may help with drainage but does not directly address airway clearance. Giving oxygen by positive pressure (choice C) may be necessary but should not be the immediate priority if the airway is obstructed. Stimulating the infant to cry (choice D) is not as critical as ensuring a patent airway.