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
Serological marker of infectivity of Hepatitis is? 
Select and explain. 
A. HBeAg, B. HBeAg, C. IgM anti Hbc, D. HBcAg
B: HBeAg
Answer: B: HBeAg 
Explanation: Ans. is 'b' i.e., HBeAg