Question

alcohol is a central nervous system ______.
stimulant
depressant
hallucinogen
antihistamine

Explanation:

Alcohol acts on the central nervous system by slowing down brain activity and neural function, which is the characteristic of a depressant. Stimulants increase activity, hallucinogens cause hallucinations, and antihistamines are for allergic reactions, so they don't fit.

Answer:

B. Depressant