Final answer:
The principle of accountability in this situation would be demonstrated if the nurse takes responsibility for the omitted medication and ensures it is properly administered.
Step-by-step explanation:
The principle of accountability in the given scenario would be demonstrated if the nurse takes responsibility for the omitted medication and ensures that it is properly administered.
For example, the nurse could immediately inform the appropriate person (such as the charge nurse or nurse manager) about the omission, document the incident in the patient's medical record, and take necessary actions to prevent any harm to the patient.
This shows that the nurse is taking ownership of the mistake and is being accountable for providing appropriate care.