Eosinophilia is caused by which of the following?

Identify the given chemical structures and select the correct option.

Identify the molecules $(A)$ and $(B)$ shown below and select the right option giving their source and use.

Identify the plant part shown in the figure.

Which medicinal drugs are obtained from the given figures $A$ and $B$?

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 $R$.
$\quad P \quad\quad Q \quad\quad R$