This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatitis, Subject name: Medicine
The commonest hepatotropic virus causing increased chronic carrier state is: 
Select and explain. 
A. HEV, B. HAV, C. HBV, D. HCV
C: HBV
Answer: C: HBV 
Explanation: * Globally, chronic HBV infection affects 350-400 million people, with disease prevalence varying among geographic regions, from 1-20%. * Most common cause of chronic hepatitis is hepatitis C but carrier stage is seen higher with hepatitis B.