Answer:
Schedule I.
Step-by-step explanation:
In order to understand better this schedule:
Schedule I — all the deadly and forbidden drugs from which can develop high dependance and damages of the whole body: heroin, marijuana, lsd, etc.
Schedule II — they are considered to be very dangerous and one can also developed mentioned conditions, but are a bit ‘ less dangerous ‘ : cocaine, adderall, Ritalin, etc...
Schedule III — moderate to low danger: Vicodin, codeine, steroids...
Schedule IV — Ambien, Xanax, Valium...