This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatitis Viruses, Subject name: Microbiology
HBV all true, except: 
Select and explain. 
A. It is a DNA virus, B. Spreads by blood transfusions, C. HBsAg marker of infection, D. Least chance of chronicity
D: Least chance of chronicity
Answer: D: Least chance of chronicity 
Explanation: Ans. is 'd' i.e., Least chance of chronicity (Ref: Harrison, 18th/e, p. 2546; 17th/e, p. 1939)* Least chances of chronicity are with HAV and HEV.* Maximum chance of chronicity is with HCV.* 90% of infants infected with HBV , become chronically infected.Remember: By definition,HBV chronic carriers are those in whom HBsAg persists for more than 6 months.