The structure shown below is of which well-known drug molecule?

Why are certain drugs called enzyme inhibitors?

Cetyltrimethylammonium chloride is which type of detergent?

Match List-$I$ with List-$II$ and choose the correct answer from the options given below:
| List-$I$ | List-$II$ |
| :--- | :--- |
| $A$. Morphine | $I$. Anti-depressant |
| $B$. Chloroxylenol | $II$. $550$ times sweeter than cane sugar |
| $C$. Phenelzine | $III$. Narcotic analgesic |
| $D$. Saccharin | $IV$. Antiseptic |

Amoxicillin is a semi-synthetic modification of:

The correct match between items of List-$I$ and List-$II$ is

List-$I$	List-$II$
$A$. Phenelzine	$p$. Pyrimidine
$B$. Chloroxylenol	$q$. Furan
$C$. Uracil	$r$. Hydrazine
$D$. Ranitidine	$s$. Phenol