Xanax is listed under which MRB category?

• A. MRB II
• B. MRB III
• C. MRB V
• D. MRB IIII

Answer: (D)

Xanax is a benzodiazepine with a legitimate medical use but known potential for abuse, classed as Schedule IV under the Controlled Substances Act. In this MRB framework, Schedule IV is denoted as MRB IIII (using four I’s). That’s why the option written as MRB IIII is the best match—it represents the same level of regulatory control as Schedule IV.

Options that map to Schedule II, Schedule III, or Schedule V would not apply to Xanax, since those schedules represent higher, similar, or lower levels of abuse potential compared to Schedule IV. Some systems print IV as IIII, which is just another way to indicate the same category.