Identify the incorrect statement.

Match the following columns and choose the correct option:

Column-$I$	Column-$II$
$1$. $Haemophilus$ $influenzae$	$p$. Malignant malaria
$2$. $Entamoeba$ $histolytica$	$q$. Elephantiasis
$3$. $Plasmodium$ $falciparum$	$r$. Pneumonia
$4$. $Wuchereria$ $bancrofti$	$s$. Amoebiasis

Which of the following is a mental disease?

Drugs such as $Thalidomide$ taken by women in the first trimester of pregnancy cause all the following malformations in the developing embryo,except:

$A$ - Smoking increases $O_2$ content in blood.
$R$ - Nicotine stimulates the adrenal gland.

Diseases spread through water medium $- P$
Diseases spread through air medium $- Q$
Diseases spread through insect vectors $- R$
$I -$ Common cold,$II -$ Amoebiasis,$III -$ Typhoid,$IV -$ Filariasis
$V -$ Pneumonia,$VI -$ Malaria,$VII -$ Ascariasis
Select the correct option for $P, Q$ and $R$.
$\quad P \quad\quad Q \quad\quad R$