Caffeine,amphetamines and cocaine are

Which chemical causes the side-effect of enlargement of the clitoris in females?

Nicotine is an alkaloid that enters the body through smoking. How many of the following characteristics are associated with its effects?
$(i)$ Increases blood pressure
(ii) Decreases respiratory rate
(iii) Causes cancer of the lungs,throat,and bladder
(iv) Induces allergies
$(v)$ Can cause emphysema
(vi) Decreases the level of $O_2$ in the blood

Match List $I$ with List $II$.

List $I$	List $II$
$A$. Heroin	$I$. Effect on cardiovascular system
$B$. Marijuana	$II$. Slow down body function
$C$. Cocaine	$III$. Painkiller
$D$. Morphine	$IV$. Interfere with transport of dopamine

Choose the correct answer from the options given below:

$Heroin$ : slows down body functions :: $cocaine$ :

What are addiction and dependence? Explain.