Intoxicant caffeine is found in

Which of the following is $NOT$ an effect of withdrawal syndrome?

Drugs like $LSD$, barbiturates, amphetamines, etc., are used as medicines to help patients with mental illness. However, excessive doses and abusive usage are harmful. Enumerate the major adverse effects of such drugs in humans.

Match the following pairs:

Column $I$ (Type of addiction)	Column $II$ (Organ/system affected)
$i$. Heroin	$a$. Increases neurotransmitter dopamine
$ii$. Marijuana	$b$. Cardiovascular system
$iii$. Cocaine	$c$. Liver cirrhosis
$iv$. Alcohol	$d$. Gastrointestinal tract

Select the correct option from the following.

Stramonium is a drug obtained from the plant species of

Why is drug and alcohol abuse observed during adolescence?