<prompt> A thiy year man presented with nausea, fever and jaundice of 5 days duration. The biochemical tests revealed a bilirubin of 6.7 mgdl conjugated 5.0 mgdl with SGOTSGPT ASTALT of 1230 900 IUml. The serological tests showed presence of HBsAg, IgM anti HBc and HBe Ag. The most likely diagnosis -Chronic hepatitis B infection with high infectivityAcute hepatitis B infection with high infectivityChronic hepatitis B infection with low infectivityAcute hepatitis B infection with low infectivity  <response>: Ans. is b i.e., Acute hepatitis B infection with high infectivity Presence of HBsAg, IgM anti HBc and HBe Ag suggest the diagnosis of acute hepatitis B with high infectivity. HBs Ag Anti HBs Ag HBe Ag Anti HBe Ag Anti HBc Ag Acute HBV high infectivity IgM Acute HBV low infectivity 1gM Chronic HBV high infectivity - IgG Chronic HBV low infectivity - IgG Recovery - IgG Immunized - 