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
True about Rabies virus is - 
Select and explain. 
A. Rabies is diagnosed by immunofluorescence, B. Rabies causes life long immunity, C. Rabies has various strains of viruses, D. Rabies vaccine is always live attenuated
A: Rabies is diagnosed by immunofluorescence
Answer: A: Rabies is diagnosed by immunofluorescence 
Explanation: The method most commonly used for diagnosis is the administration of rabies virus antigen by immunofluorescence. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-533