Which one of the following is a mental disability?

Match the following:

Column-$I$	Column-$II$
$(1)$ $AIDS$	$(A)$ Rhino Virus
$(2)$ Common Cold	$(B)$ Carcinogen
$(3)$ Malaria	$(C)$ Salmonella
$(4)$ Cancer	$(D)$ Plasmodium
	$(E)$ Retrovirus

Match the following columns and select the correct option:

Column-$I$	Column-$II$
$(i)$ Typhoid	$(a)$ Haemophilus influenzae
$(ii)$ Malaria	$(b)$ Wuchereria bancrofti
$(iii)$ Pneumonia	$(c)$ Plasmodium vivax
$(iv)$ Filariasis	$(d)$ Salmonella typhi

Which pair represents diseases spread through the air?

$A$ person,who shows unpredictable moods,outbursts of emotion,quarrelsome behaviour and conflicts with others,is suffering from

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 $S$.