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
True about HIV epidemiology -a) Children rarely affectedb) < 10% of HIV infected person progress to AIDSc) Southern africa have 72% of total global burdend) Seminal secretion is more infectious than vaginal secretione) HIV cases can infect in the window period 
Select and explain. 
A. bce, B. bde, C. acde, D. abde
C: acde
Answer: C: acde 
Explanation: None