This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
About rabies true is - 
Select and explain. 
A. Vaccine causes life long immunity, B. Multiple strains are found, C. CNS infection occurs through viremia, D. Bullet-shaped nonenveloped, double stranded RNA virus
A: Vaccine causes life long immunity
Answer: A: Vaccine causes life long immunity 
Explanation: The introduction of cell culture vaccine which are free from serious complication has made pre exposure immunisation in humans safe and feasble REF:ANANTHANARYANAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.534