Which one of the following is an opiate narcotic?

Read the following statements:
$a.$ Heroin,commonly called smack,is obtained by acetylation of morphine.
$b.$ Cocaine is obtained from the latex of Papaver somniferum.
$c.$ Dopamine is an excitatory neurotransmitter.
$d.$ Morphine is an effective sedative and painkiller.
Mark the option which includes both correct statements.

Nicotine acts as a stimulant because it mimics the effect of ......... .

Which analgesic drug acts on the neurons of the brain?

The synthetic drugs that are structurally similar to adrenaline are:

In your view,what motivates youngsters to take to alcohol or drugs,and how can this be avoided?