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
Microfilariae of the following parasites are found in blood except - 
Select and explain. 
A. Brugia malayi, B. Loa Loa, C. Onchocerca volvulus, D. Wuchereria bancrofti
C: Onchocerca volvulus
Answer: C: Onchocerca volvulus 
Explanation: produces onchocerciasis Adult worm may occur in subcutaneous nodules Nodules are painless (refer pgno:173 baveja 3 rd edition)