Name the three principal disease agents transmitted by mosquitoes in many regions and their corresponding primary vectors.

• A. Malaria (Anopheles), Dengue/Chikungunya/Zika (Aedes), West Nile Virus (Culex).
• B. Malaria (Aedes), Dengue (Anopheles), West Nile Virus (Anopheles).
• C. Malaria (Culex), Dengue (Aedes), West Nile Virus (Aedes).
• D. Malaria (Anopheles), Dengue (Culex), West Nile Virus (Anopheles).

Answer: (A)

Understanding which mosquito genera are the main carriers of these human diseases helps explain why control efforts target specific species. The malaria parasite is transmitted by Anopheles mosquitoes, which primarily feed at night and are well adapted to human blood. Dengue, chikungunya, and Zika viruses are mainly spread by Aedes mosquitoes, especially Aedes aegypti (and sometimes Aedes albopictus); these mosquitoes favor urban environments, breed in small standing-water containers, and bite mainly during the day, enabling rapid spread in dense populations. West Nile virus, on the other hand, is chiefly carried by Culex species, which feed on birds and are common in many temperate regions, with humans acting as incidental hosts. The mapping in the correct answer aligns with these well-established vector partnerships.