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
Which of the following antigen is found within the nuclei of infected hepatocytes and not usually in the peripheral circulation in Hepatitis B' infection ? 
Select and explain. 
A. HBeAg, B. HBcAg, C. Anti-HBc, D. HBsAg
B: HBcAg
Answer: B: HBcAg 
Explanation: None