Match the diseases in Column-$I$ with their causative organisms in Column-$II$ and select the correct option:

Column-$I$ (Disease)	Column-$II$ (Causative Organism)
$(a)$ Typhoid	$(i)$ Wuchereria
$(b)$ Pneumonia	$(ii)$ Plasmodium
$(c)$ Filariasis	$(iii)$ Salmonella
$(d)$ Malaria	$(iv)$ Haemophilus

Which of the following hormones is essential for maintaining pregnancy and preventing miscarriage?

Match the incorrect pair.

Select the correct pairs of diseases and their respective symptoms.
$i$. Elephantiasis - swollen limbs especially legs, enlargement of lymph vessels and lymph nodes.
$ii$. Malaria - Infected skin which shows enlarged red rings, nails become thick, discoloured and disfigured.
$iii$. Dermatophytosis - Cyclic high fever followed by sweating and sudden shivering every two days or three days.
$iv$. Pneumonia - Dyspnea, cough produces yellow or greenish sputum or phlegm.
Choose the correct option.

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

Which of the following pairs is not correctly matched?