Which of the following is an example of a Schedule II drug?

Morphine is classified as a Schedule II drug due to its high potential for abuse, which can lead to severe psychological or physical dependence. Schedule II drugs are substances that, while having recognized medical uses, come with strict regulations due to their capacity for addiction and misuse. Morphine is commonly prescribed for severe pain management, such as in cancer treatment or post-surgical care, emphasizing its legitimate therapeutic application, balanced against the risks associated with its use.

In contrast, the other substances listed, such as LSD (a Schedule I drug with no accepted medical use), cocaine (which is also Schedule II but often associated more with recreational use despite some medical applications), and heroin (a Schedule I substance with a high potential for abuse and no accepted medical use), do not fit the criteria for Schedule II classification in the same way as morphine.