Which of the following is an example of a Schedule II Controlled Substance?

Fentanyl is classified as a Schedule II Controlled Substance due to its high potential for abuse and the risk of severe physical dependence. Schedule II substances are recognized as having legitimate medical uses but are subject to strict regulations due to their potential for addiction and misuse. Fentanyl is used medically for pain management, particularly in cases of severe pain, such as cancer pain or post-surgical pain, but it is also associated with a significant risk of overdose when misused.

In contrast, other substances listed have different classifications. Lysergic acid is more commonly associated with hallucinogens, anabolic steroids are usually classified as Schedule III substances, and buprenorphine, while it has a critical role in treating opioid addiction, is typically classified as a Schedule III or IV depending on its formulation. Therefore, fentanyl's particular characteristics regarding medical use and abuse potential place it firmly in Schedule II.