Aminoglycosides are usually used as

With the help of an example,explain how do tranquilizers control the feeling of depression?

Which of the following compounds are not used as disinfectants?
$A$. Chloroxylenol $B$. Bithional $C$. Veronal $D$. Prontosil $E$. Terpineol
Choose the correct answer from the options given below:

Consider the following structure. For codeine,$R$ stands for:

Which of the following drugs is used as a tranquilizer?

The correct statements about $Z$ from the following are:
$I$. It is $o$-hydroxybenzoic acid.
$II$. It is a non-narcotic analgesic.
$III$. It acts as an antipyretic.
$IV$. It acts as an antihistamine.