Which of the following is a synthetic sedative drug?

Hallucinogenic properties are seen in . . . . . . .

Which one of the following is not a matching pair of a drug and its category?

Nayan's friend is consuming drugs. What should Nayan do?
$(i)$ Discuss with the friend's parents. $(ii)$ Bring the matter to the attention of the friend's teacher. $(iii)$ Advise him to stay away from alcohol and drugs. $(iv)$ Try to understand why he is consuming drugs and show empathy. $(v)$ Inform him about the physical harm caused by addiction. $(vi)$ Provide proper guidance and help him stay away from addiction.

$A$ well-known analgesic drug is:

Nicotine is: