What does drug abuse mean?

Which of the following are useful suggestions for the prevention and control of alcohol and drug abuse during adolescence?
$(1)$ Avoid undue peer pressure
$(2)$ Seeking professional and medical help
$(3)$ Looking for danger signs
$(4)$ Education and counselling
$(5)$ Seeking help from parents and peers

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

Match List $I$ with List $II$ :

List $I$	List $II$
$A.$ Cocaine	$I.$ Effective sedative in surgery
$B.$ Heroin	$II.$ Cannabis sativa
$C.$ Morphine	$III.$ Erythroxylum
$D.$ Marijuana	$IV.$ Papaver somniferum

Choose the correct answer from the options given below:

$A$ well-known painkiller is .........

Identify the odd one out in the context of drugs derived from the same plant source.