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
Which of these hepatitis viruses replicates its genome in the nucleus of the host hepatocyte? 
Select and explain. 
A. HBV, B. HCV, C. HEV, D. HAV
A: HBV
Answer: A: HBV 
Explanation: Ans. A. HBVHepatitis B is the only hepatitis virus with a DNA genome (thus requiring entry into the nucleus for transcription of the genome into mRNA).