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: Pathology
Marker of level of liver injury in cases of hepatitis B is - 
Select and explain. 
A. HBsAg, B. HBV DNA, C. Anti HBeAg, D. Anti HBc
B: HBV DNA
Answer: B: HBV DNA 
Explanation: Ans. is 'b' i.e., HBV DNA In patients with chronic hepatitis B infection the level of HBV DNA correlates with the level of liver injury and risk of progression of disease.