Every record of controlled substances shall be kept for a period of how long from the date of the transaction recorded?

The correct answer is five years, as this corresponds with federal and state regulations regarding the maintenance of records for controlled substances. Under the federal Controlled Substances Act, records related to the purchasing, dispensing, and inventory of controlled substances must be retained for a minimum of five years. This timeframe allows regulatory authorities to effectively monitor compliance, conduct audits, and ensure that medication tracking is maintained for a sufficient duration.

While other options suggest shorter or longer retention periods, they do not align with the established requirements for record-keeping of controlled substances. Adhering to the five-year requirement is crucial for pharmacists and pharmacy personnel to meet legal obligations and maintain proper documentation practices in the handling of controlled medications.