Question

which of the following is a street name for opioids?
fentanyl
oxycodone
happy pills
sleeping pills

Explanation:

Fentanyl and oxycodone are medical - names of opioids. "Happy pills" is a general street - name for various drugs including some opioids in some contexts, while "sleeping pills" usually refer to non - opioid sedatives.

Answer:

C. Happy pills