This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncogenic Virus, Subject name: Microbiology
Which off the following is an oncogenic retrovirus? 
Select and explain. 
A. HTLV-1, B. HPV, C. EBV, D. HBV
A: HTLV-1
Answer: A: HTLV-1 
Explanation: Ans: A (HTLV-1) Ref: Jawetz, Mel nick & Adel bergs Textbook of Medical Microbiology, 25th Edition. 2010Explanation:* Viruses which produce tumors in either their natural host or experimental animals or induce malignant transformation in cell cultures are called oncogenic viruses.RNA virusesCANCERHCVHTLV1HIVHepatocellular cancerAdult T cell leukemiaAIDS related malignanciesDNA virusesCANCERHPVGenital tumoursOropharyngeal cancerBurkitt's lymphomaNasopharyngeal carcinomaB cell lymphomaKaposi's sarcomaHepatocellular cancerEBVHHV 8HBV