A Patient with a Known Exposure to Hepatitis B 3

Multiple Choice

A patient with a known exposure to hepatitis B 3 weeks earlier has negative results for all markers when a hepatitis profile is performed, except for IgM anti-HBc. What is a possible reason for this result?

A) The wrong patient specimen was tested.
B) A false-negative result was caused by a technical error.
C) HBsAg was still too low in concentration to detect.
D) Anti-HBs titer had already peaked and was no longer detectable.