Which of the following drugs are used to help patients suffering from mental illnesses like depression and insomnia?

Which pair represents diseases spread through the air?

Identify the chemical structure given below.

Identify the mosquito that is currently widely found as a disease vector in India.

Match the following columns.

Column-$I$	Column-$II$
$(1)$ $HIV$	$(v)$ Oncogenic virus
$(2)$ Cancer	$(w)$ Microsporum,Trichophyton
$(3)$ Allergens	$(x)$ Retrovirus
$(4)$ Ringworm	$(y)$ Colostrum
	$(z)$ Serotonin

Given diseases: Pneumonia,Plague,Diphtheria,Common cold,Malaria,Ringworm,Amoebiasis,Dysentery,Typhoid,$AIDS$.
$\rightarrow$ Number of bacterial diseases $- P$
$\rightarrow$ Number of viral diseases $- Q$
$\rightarrow$ Number of protozoan diseases $- R$
$\rightarrow$ Number of fungal diseases $- S$
Select the correct option for $P, Q, R$ and $S$.