This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
In culex mosquito the type of biological transmission for filarial parasite is - 
Select and explain. 
A. Cyclo-developmental, B. Cyclo-propagative, C. Propagative, D. Cyclical
A: Cyclo-developmental
Answer: A: Cyclo-developmental 
Explanation: The following stages of development takes place in the vector Exsheathing First stage larva Second stage larva Third stage larva (Refer pgno:271 park 23rd edition)