This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiology & Histology, Subject name: Gynaecology & Obstetrics
Drug that is used for fetal lung maturity is: 
Select and explain. 
A. Dexamethasone, B. Folic acid, C. Beclomethasone, D. None
A: Dexamethasone
Answer: A: Dexamethasone 
Explanation: Ans. a. DexamethasoneRef: Williams Obstetrics 24th Ed; Page No-754ANTENATAL CORTICOSTEROID THERAPYA single dose of corticosteroids is recommended for pregnant women with gestational age 23-34 weeks of gestation who are at risk of preterm delivery within 7 days.A complete course isBetamethasone two IM 12-mg doses given 24 hours apartORDexamethasone four IM 6-mg doses given 12 hours apart.Lower severity, frequency, or both of respiratory distress syndrome, intracranial hemorrhage, necrotizing enterocolitis and death are seen such type of neonates whose mothers receive antenatal corticosteroids.