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: Medicine
Which of the following markers in the blood is the most reliable indicator of recent hepatitis infection- 
Select and explain. 
A. HBsAg, B. lgG anti - HBs, C. IgM anti - HBc, D. gM anti - HBe
C: IgM anti - HBc
Answer: C: IgM anti - HBc 
Explanation: None