Final answer:
Schedule II drugs must be inventoried every 6 months to comply with regulations aimed at preventing misuse and ensuring compliance with federal drug control policies.
Step-by-step explanation:
Schedule II drugs must be inventoried every b) 6 months. According to the Controlled Substances Act (CSA), pharmacies, hospitals, and other entities that handle controlled substances must keep precise records. Schedule II drugs have a high potential for abuse which may lead to severe psychological or physical dependence. Therefore, the Drug Enforcement Administration (DEA) requires that these drugs be inventoried on a regular and stringent schedule to prevent misuse and to ensure compliance with federal drug control policies.