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
The organism most commonly causing genital filariasis in most part of Bihar and eastern U.P. is- 
Select and explain. 
A. Wuchereria bancrofti, B. Brugia malayi, C. Onchocerca volvulus, D. Dirofilaria
A: Wuchereria bancrofti
Answer: A: Wuchereria bancrofti 
Explanation: The nocturnal periodic strains of Wuchereria bancrofti is most wide spread in India.
Mainly along seacoast and riverbanks.
Heavily infected areas – Uttar Pradesh, Bihar, Andhra Pradesh, Orissa, Tamil Nadu, Kerala and Gujarat