This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Which of the following is a DNA virus 
Select and explain. 
A. Hepatitis A virus, B. Hepatitis B virus, C. Hepatitis C virus, D. Hepatitis D virus
B: Hepatitis B virus
Answer: B: Hepatitis B virus 
Explanation: None