What complication can arise from an improperly sized oropharyngeal airway?

An improperly sized oropharyngeal airway can lead to airway obstruction, making this the correct answer. When the airway is too small, it may not adequately open the airway, allowing proper airflow. Conversely, if the airway is too large, it can push the tongue further back into the throat or create excessive pressure against the soft tissues, leading to swelling or obstruction.

Maintaining a clear and open airway is crucial in emergency care, as any obstruction can severely hinder oxygen flow and result in critical situations such as hypoxia. This underscores the importance of selecting the correct size for the oropharyngeal airway based on the patient's anatomy, ensuring that it fits properly to facilitate adequate ventilation and prevent complications.