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
HBV replication is indicated by -a) HBV DNAb) DNA polymerasec) HBeAgd) Anti-HBe 
Select and explain. 
A. abc, B. bc, C. acd, D. bcd
A: abc
Answer: A: abc 
Explanation: None