Identify the odd one out.

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.

How does the transmission of each of the following diseases take place?
$(a)$ Amoebiasis
$(b)$ Malaria
$(c)$ Ascariasis
$(d)$ Pneumonia

Choose the correct statement $-$

Find the correct match.

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