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
[{'content': 'Serological marker of infectivity of Hepatitis is? \nSelect and explain. \nA. HBeAg, B. HBeAg, C. IgM anti Hbc, D. HBcAg', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., HBeAg", 'role': 'assistant'}]