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: Social & Preventive Medicine
Risk of mother to child HIV transmission in pregnant woman at the time of delivery, and after delivery in non breast feeding woman is 
Select and explain. 
A. 5-10%, B. 15-30%, C. 10-15%, D. More than 50%
B: 15-30%
Answer: B: 15-30% 
Explanation: HIV transmission in absence of intervention:
MTCT of HIV in developed countries: 20% (15-25%)
MTCT transmission of HIV in developing countries: 30% (25-35%)