Ans: C. -PCR for hepatitis C virus(Ref Harrison 19/e p2017, 2018: 18/e p2551)Positive Anti-HBcAg IgG:Mere indicator of hepatitis B infection in past.Positive Anti-HCV antibody:Most sensitive indicator of HCV infection - Presence of HCV.Presence of Anti-HCV antibody points to hepatitis C infection a Hence HCV-RNA levels determined to establish chronic hepatitis C diagnosis before staing Interferon therapy.Requires molecular amplification by PCR.Testing for HCV RNA or repeat anti-HCV testing later stages - Necessary to establish diagnosis.
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