Step 1: Understanding the Concept
Only female mosquitoes bite and spread diseases, because they need blood for egg development.
Step 2: Malaria
Malaria (Plasmodium) is spread by the female Anopheles mosquito (II).
Step 3: Dengue and filariasis
Dengue virus is carried by the female Aedes mosquito (III). Filariasis (Wuchereria) is carried by the female Culex mosquito (IV).
Step 4: Select the option
The set A-II, B-III, C-IV is given in option D.
Final Answer:
The correct matching is A-II, B-III, C-IV.
\[ \boxed{\text{(D) }\text{A-II, B-III, C-IV}} \]