The use of which of the following causes the destruction of chromosomes?

With repeated use of drugs,the tolerance level of the receptors present in our body ......

From which part of $Cannabis \text{ } indica$ are bhang, ganja, and charas obtained?

Which chemical substance affects the coronary artery disease?

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.

Drugs and alcohol give short-term 'high' and long-term 'damages'. Discuss.