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: Microbiology
Markers of acute viral hepatitis caused by HBV 
Select and explain. 
A. IgM anti HBc Ag, B. IgG anti HBc Ag, C. IgM anti Hbs Ag, D. IgG anti HBs Ag
A: IgM anti HBc Ag
Answer: A: IgM anti HBc Ag 
Explanation: In acute hepatitis following serological markers are present:

HBs Ag
Ig M anti HBc Ag (in recent infection) or IgG anti HBc Ag (in remote infection).
Hbe Ag (with high infectivity) or Anti Hbe Ag (with low infectivity).