A 20 year old male presents with jaundice for the past 2 weeks.His liver function tests revealed serum bilirubin to be 0.9 mg/dl, SGOT/SGPT to be 1240/1450 Iu.He was found to be positive for HBsAg and IgM anti-HEV antibodies and negative for IgM anti-HBc.The most likely diagnosis is -

• A. Acute hepatitis with mutant hepatitis B virus
• B. Superinfection of hepatitis E virus which chronic hepatitis B infection
• C. Acute hepatitis with wild type hepatitis B virus
• D. Co-infection of hepatitis B and E virus