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: Gynaecology & Obstetrics
If untreated, percentage of mother to child transmission of HIV during delivery without intervention in a non-breast fed child is: 
Select and explain. 
A. 40-50%, B. 10-15%, C. 15-30%, D. 5%
C: 15-30%
Answer: C: 15-30% 
Explanation: Answer- C. 15-30%'In the absence of any intervention, an estimated 15-30% of mothers with HIY infection will transmit the infection duringprcgnsncy and delivery. and 10-20% will transmit the infection, through breast feeding. Veical transmission of IIIV-Loccurs mostly during the intrapaum period (50-70%).'- COGDT l0/e p692