<prompt> All are oncogenic viruses exceptHBVHPVEBVVZV  <response>: Many viruses have been implicated in the causation of cancers:A. RNA virusesAll oncogenic RNA viruses belong to family retroviridae retroviruses.Important examples are Avian leukosis virus, murine leukosis virus, murine mammary tumor virus, HIV causing AIDS related malignancies and Human-T-cell leukemia virus causing Adult T-cell leukemia.B. DNA virusesDNA viruses causing cancers are:1. Papillomaviridea HPV: Causes genital tumors, SCC and oropharyngeal carcinoma.2. Herpesviridae: These viruses are:i. HSV-2: Causes cervical carcinoma.ii. EBV: Causes nasopharyngeal carcinoma and Burkitts lymphoma.iii. HHV-8: It causes Kaposis sarcoma.3. Hepadnaviridae HBV: It causes hepatocellular carcinoma.4. Flaviviridae HCV It causes hepatocellular carcinoma. 