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 of 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. 10-15%, C. 15-30%, D. More than 50%
C: 15-30%
Answer: C: 15-30% 
Explanation: None