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
PML is caused by - 
Select and explain. 
A. CMV, B. Papova virus, C. HIV, D. Polio virus
B: Papova virus
Answer: B: Papova virus 
Explanation: polyoma virus(belongs to papova viruses) causesPML REF:ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.554