Schedule One controlled substances are:

• A. High addictive with no known medical value
• B. High addictive with medical value
• C. Low addictive with medical value
• D. Not addictive with no medical value

Answer: (A)

Schedule I substances are placed in the top category because they have a high potential for abuse and there is no currently accepted medical use in the United States, along with a lack of accepted safety for use under medical supervision. The option describing something with a high potential for abuse and no medical use fits this definition best, so it is the correct choice. The other options don’t fit because they imply medical value exists, or the abuse potential is lower, which would place the substance in a different schedule.