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
Antenatal coicosteroids to reduce neonatal respiratory distress syndrome is most effective: 
Select and explain. 
A. When given between 28 and 34 weeks, B. When given every week, C. When given within 48 hours of delivery, D. When given less than 28 weeks
A: When given between 28 and 34 weeks
Answer: A: When given between 28 and 34 weeks 
Explanation: When given between 28 and 34 weeks