This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Kallu a 30 year old man, presented with subcutaneous itchy nodules over the left iliac crest. On examination they are firm, non tender and mobile. Skin scrapping contains microfilaria and adults worms of- 
Select and explain. 
A. Loa Loa, B. Onchocerca volvulus, C. Brugia malayi, D. Mansonella persutans
B: Onchocerca volvulus
Answer: B: Onchocerca volvulus 
Explanation: None