Which substance is obtained from the unripe fruit of $Papaver somniferum$?

With which receptors do opioids bind?

Which of the following is known as 'brown sugar'?

In a young addict,symptoms such as inhibition of brain activity,calming of the brain,and feelings of relaxation are observed. Which drug is he likely consuming?

Match List-$I$ with List-$II$:

List-$I$ (Drug)	List-$II$ (Effect)
$A$. Nicotine	$I$. Causes sense of euphoria and increased energy
$B$. Morphine	$II$. Stimulates adrenal gland to release catecholamines into blood circulation
$C$. Heroin	$III$. Effective sedative and painkiller
$D$. Cocaine	$IV$. $A$ depressant; slows down body function

Choose the correct answer from the options given below:

From which plant parts are Bhang, Ganja, and Charas obtained?