This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Mother to child transmission of HIV - 
Select and explain. 
A. 25%, B. 50%, C. 60%, D. 75%
A: 25%
Answer: A: 25% 
Explanation: HIV may pass from infected mother to foetus through placenta or to her infant during delivery. In absence of any intervention rate of this vary from 20-25%. Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 364