Which pair represents diseases spread through the air?

Match the following columns correctly.

Column $I$	Column $II$	Column $III$
$(a)$ Typhoid	$(p)$ Streptococcus	$(w)$ Human skin
$(b)$ Pneumonia	$(q)$ Rhinovirus	$(x)$ Patient's feces
$(c)$ Common cold	$(r)$ Salmonella	$(y)$ Contaminated pens
$(d)$ Filariasis	$(s)$ Filarial worm	$(z)$ Sputum

Which of the following infection$(s)$ can be diagnosed by the use of polymerase chain reaction $(PCR)$?

Which types of narcotic substances can be obtained from the parts of the leaf or flower shown in the figure?

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

Social therapy of mental illness is required for