question: Q:A 35-year-old male anesthesiologist presents to the occupational health clinic after a needlestick exposure while obtaining an arterial line in a patient with cirrhosis. In addition to a standard bloodborne pathogen laboratory panel sent for all needlestick exposures at his hospital, additional hepatitis panels are ordered upon the patient's request. The patient's results are shown below:
  
  HIV 4th generation Ag/Ab: Negative/Negative
  Hepatitis B surface antigen (HBsAg): Negative
  Hepatitis C antibody: Negative
  Anti-hepatitis B surface antibody (HBsAb): Positive
  Anti-hepatitis B core IgM antibody (HBc IgM): Negative
  Anti-hepatitis B core IgG antibody (HBc IgG): Positive
  
  What is the most likely explanation of the results above?? 
  {'A': 'Acute infection', 'B': 'Chronic infection', 'C': 'Immune due to infection', 'D': 'Immune due to vaccination', 'E': 'Window period'},