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
Which of the following is not an RNA virus? 
Select and explain. 
A. Ebola, B. Simian 40, C. Rabies, D. Vesicular stomatitis virus
B: Simian 40
Answer: B: Simian 40 
Explanation: Simian vacuolating virus (SV40) is a small nonenveloped, icosahedral DNA tumour virus. Polyoma & SV40 produce malignant tumours when inoculated into the newborn mice / hamsters. These viruses have been widely employed in the study of viral oncogenesis. Also Know: Oncogenic. RNA viruses - An leukosis viruses, Murine leukosis viruses, Human T cell leukaemia viruses, Leukosis - sarcoma virus. Oncogenic DNA viruses - Polyomavirus, SV40, Molluscum contagiosum, Epstein-Barr virus, Cytomegalovirus, Herpes simplex viruses type 1& 2. Ref: Ananthanarayanan & Paniker's textbook of microbiology 8th ed pg 549.