Which of the Following Is an Antagonist the Blocks the Actions

Multiple Choice

Which of the following is an antagonist the blocks the actions of a particular neurotransmitter?

A) Amphetamines that produce states of pleasure.
B) Caffeine that keeps the central nervous system stimulated.
C) Antipsychotic drugs that help control hallucinations and delusional thinking.
D) Alcohol that produces a relaxed feeling.
E) A tranquilizer like Valium that reduces anxiety in people with panic disorder.