This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
Vector for Kala-azar- 
Select and explain. 
A. Flea, B. Tsetse fly, C. Sand fly, D. Tick
C: Sand fly
Answer: C: Sand fly 
Explanation: 2 hosts Man and dog-veebrate host Female sandfly of the genus phlebotomous-intermediate host (refer pgno:39 baveja 3 rd edition)