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
A 50yr old male presented with various subcutaneous nodules over right iliac crest which is around 1cm in diameter. Inside the excised nodules adult worms and microfilariae were detected. Which of the following organism is likely the causative agent? 
Select and explain. 
A. Onchocerca volvulus, B. Loa Loa, C. Mansonella, D. Brugia malayi
B: Loa Loa
Answer: B: Loa Loa 
Explanation: Onchocerca volvulus produces SC nodules commonly.nodules are called as onchocercomas. They are stained by H and E Ref: D.R. Arora. Medical parasitology 4th ed pg. 230