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
One of the following microfilaria does not posses nuclei upto tail tip - 
Select and explain. 
A. W. bancrofti, B. Loa- Loa, C. M. perstons, D. B. malayi
A: W. bancrofti
Answer: A: W. bancrofti 
Explanation: None