Which of the following is a mental disease?

$S -$ Statement: Mature seeds of opium are used to prevent stomach cramps.
$R -$ Reason: Anticancer drugs are not specific to a particular tumor.

Match List $- I$ with List $- II$.

List $- I$	List $- II$
$(a)$ Filariasis	$(i)$ Haemophilus influenzae
$(b)$ Amoebiasis	$(ii)$ Trichophyton
$(c)$ Pneumonia	$(iii)$ Wuchereria bancrofti
$(d)$ Ringworm	$(iv)$ Entamoeba histolytica

Choose the correct answer from the options given below.

Which of the following is an important infectious disease in humans?

Assertion: Cocaine has a potent stimulating action on the central nervous system,producing a sense of euphoria and increased energy.
Reason: Injecting the microbes intentionally during immunisation or infectious organisms gaining access into the body during natural infection induces active immunity.

In the given diagram of the life cycle of Anopheles,what do the parts labeled '$A$' and '$B$' represent respectively?