The question is asking us to match the agent of transmission (i.e., the mosquito or sandfly) with the disease that is transmitted by that particular agent.

Option 1 states that the Anopheles mosquito transmits Kala azar, the Culex mosquito transmits Dengue, Aedes mosquito transmits Filaria, and the Sandfly transmits Malaria.

Option 2 states that the Anopheles mosquito transmits Dengue, the Culex mosquito transmits Filaria, Aedes mosquito transmits Kala azar, and the Sandfly transmits Malaria.

Option 3 states that the Anopheles mosquito transmits Kala azar, the Culex mosquito transmits Dengue, Aedes mosquito transmits Filaria, and the Sandfly transmits Malaria.

Option 4 states that the Anopheles mosquito transmits Malaria, the Culex mosquito transmits Filaria, Aedes mosquito transmits Dengue, and the Sandfly transmits Kala azar.

The correct answer is option 4, as it correctly matches the agent of transmission with the corresponding disease.

So, the correct match is:

Anopheles mosquito - Malaria

C