Final answer:
The ethical concept that is most relevant to this situation is Informed Consent. Informed consent is the process of obtaining permission from a patient before performing a medical procedure or prescribing medication.
Step-by-step explanation:
The ethical concept that is most relevant to this situation is Informed Consent. Informed consent is the process of obtaining permission from a patient before performing a medical procedure or prescribing medication. In this scenario, the nurse has discovered a discrepancy in the patient's medical records, and the patient is unaware of the error. It is important for the patient to have all the necessary information and to be fully informed about their prescribed medication. The nurse should advocate for the patient's right to be informed and ensure that the discrepancy is corrected.