Which of the following is an antibiotic drug?

Which one of the following chemicals is responsible for the production of $HCl$ in the stomach leading to irritation and pain?

What are antagonistic drugs?

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.

Match the structures given in Column-$I$ with the type of detergents given in Column-$II$.

Column-$I$	Column-$II$
$(A)$ $CH_3(CH_2)_{16}COO(CH_2CH_2O)_nCH_2CH_2OH$	$(1)$ Cationic detergent
$(B)$ $C_{17}H_{35}COO^-Na^+$	$(2)$ Anionic detergent
$(C)$ $CH_3(CH_2)_{10}CH_2SO_3^-Na^+$	$(3)$ Nonionic detergent
$(D)$ $[CH_3(CH_2)_{15}N(CH_3)_3]^+Br^-$	$(4)$ Soap

Aspirin is also known as