Cocaine is obtained from:

What is the primary function of narcotic drugs?

Nicotine is

Which chemicals are released into the blood due to the effect of nicotine?

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.

$LSD$ (Lysergic acid diethylamide) is produced from which acid?