Which of the following can possibly be used as an analgesic without causing addiction and mood modification?

Which of the following is a local anaesthetic?

What is the basic difference between antiseptics and disinfectants?

Given below are two statements: One is labelled as Assertion $A$ and the other labelled as Reason $R$.
Assertion $A:$ Antihistamines do not affect the secretion of acid in stomach.
Reason $R :$ Antiallergic and antacid drugs work on different receptors.
In the light of the above statements,choose the correct answer from the options given below:

Match the following.

Column $I$	Column $II$
$A$. Analgesic	$I$. Phenelzine
$B$. Tranquilizer	$II$. Terfenadine
$C$. Antibiotic	$III$. Codeine
$D$. Antihistamine	$IV$. Prontosil

Explain artificial sweetening agents.