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
Sero conversion in HIV Infection takes place in ? 
Select and explain. 
A. 2 weeks, B. 4 weeks, C. 9 weeks, D. 12 weeks
B: 4 weeks
Answer: B: 4 weeks 
Explanation: Ans. is 'b' i.e., 4 weeks . The mean time to seroconversion after HIV infection is 3-4 weeks.