Question

which one of the following is an example of a central nervous system (cns) depressant drug?
cocaine
caffeine
nicotine

Explanation:

Cocaine is a stimulant. Caffeine is a stimulant that acts on the CNS to increase alertness. Nicotine is also a stimulant. None of these are CNS depressants. However, if we consider the nature of these drugs in general knowledge, none of the given options are CNS depressants. But among common - known drugs, the question might be testing knowledge and since the others are stimulants, by elimination, if we assume this is a mis - list question, we need to know the characteristics of CNS depressants which slow down CNS activity.

Answer:

None of the above options are central nervous system depressant drugs.