(d) : All the options given are diseases with their associated vector which transmit the respective diseases. Leishmaniasis, also called kala azar is caused by Leishmania donovani. It is spread by sand fly (Phlebotomus) and characterised by enlarged spleen and liver with high fever. Sleeping sickness is caused by a protozoan Trypanosoma gambiense. Filariasis is caused by worm Wuchereria bancrofti. Dengue fever is caused by arbo virus.