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
Possibility of veical transfer of HIV infection if prophylaxis is given: March 2007 
Select and explain. 
A. 1%, B. 2%, C. 3%, D. 4%
A: 1%
Answer: A: 1% 
Explanation: Ans. A: 1% Possibility of veical transfer of HIV infection in pregnant woman who are receiving combination antiretroviral therapy is approaching 1%.