Which of the following is a DNA virus?

Correct option is B

Sol. Hepatitis B virus (HBV) is a partially double-stranded DNA virus, belonging to the Hepadnaviridae family. It replicates via reverse transcription. Other hepatitis viruses (A, C, D, E) are RNA viruses and differ in structure and replication.
Explanation of each option:
· (a) Hepatitis A – An RNA virus spread through the feco-oral route, not a DNA virus.
· (b) Hepatitis B – Correct. It is the only hepatitis virus with a DNA genome and uses reverse transcription.
· (c) Hepatitis C – A single-stranded RNA virus, primarily bloodborne, causes chronic hepatitis.
· (d) Hepatitis D – A defective RNA virus that needs Hepatitis B to replicate.