Final answer:
A student nurse adheres to the ethical concept of accountability by reporting a medication administration mistake.
Step-by-step explanation:
The ethical concept that a student nurse adheres to by reporting a medication administration mistake is d) Accountability.
Accountability refers to taking responsibility for one's actions and being answerable for the outcomes. By reporting a medication administration mistake, the student nurse demonstrates accountability by acknowledging the error and taking steps to rectify it. This act helps ensure patient safety and quality of care.