Identify a medicinal compound having amide linkage.

In the given reaction scheme,$P$ is a phenyl alkyl ether,$Q$ is an aromatic compound; $R$ and $S$ are the major products.
$P$ $\xrightarrow{HI} Q$ $\xrightarrow[\text{(iii) } H_3O^{+}]{\text{(i) } CO_2, \text{(ii) } NaOH} R$ $\xrightarrow[\text{(ii) } H_3O^{+}]{\text{(i) } (CH_3CO)_2O} S$
The correct statement about $S$ is:

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

List-$I$	List-$II$
$A$. Antipyretic	$I$. Reduces pain
$B$. Analgesic	$II$. Reduces stress
$C$. Tranquilizer	$III$. Reduces fever
$D$. Antacid	$IV$. Reduces acidity

Choose the correct answer from the options given below:

What is the basic difference between antiseptics and disinfectants?

The following compound is used as:

Which of the following is/are barbiturates?