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
Dose of dexamethasone given to mother in anticipated preterm delivery: 
Select and explain. 
A. 12 mg 12 hourly 2 doses, B. 12 mg 24 hourly 4 doses, C. 6 mg 24 hourly 2 doses, D. 6 mg 12 hourly 4 doses
D: 6 mg 12 hourly 4 doses
Answer: D: 6 mg 12 hourly 4 doses 
Explanation: Ans: D. 6 mg 12 hourly 4 doses(Ref Dutta 8/e p367, 7/e p316: Nelson 20/e p 852)Dose of dexamethasone given to anticipated preterm delivery mother - 6 mg 12 hourly 4 doses.Antenatal coicosteroids:Single course recommended for 24-34 weeks gestation with preterm delivery risk.Drugs & dosage:Dexamethasone (6 mg, 12 hourly, 4 doses).Betamethasone (12 mg, 2 doses, 24 hours apa).