Kala-azar is transmitted by which species of sandfly?

Correct option is D

Ans. (d) Phlebotomus
Sol. Kala-azar, also known as visceral leishmaniasis, is transmitted by the bite of the female Phlebotomus sandfly. It is caused by the parasite Leishmania donovani.
Explanation of each option:
· (a) Anopheles – Vector for malaria, not kala-azar.
· (b) Aedes – Transmits dengue, chikungunya, and Zika virus.
· (c) Culex – Responsible for filariasis and Japanese encephalitis.
· (d) Phlebotomus – Correct. Transmits kala-azar.