Which of the following is a local anaesthetic?

Identify antihistamines from the following:

$1. \text{Serotonin}$	$2. \text{Dimetane}$
$3. \text{Phenelzine}$	$4. \text{Seldane}$

Chloroxylenol is an important component of which of the following?

Which of the following is not correctly matched?

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.

Parathion is