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
For fetal lung maturation, all the corticosteroids can be used except: 
Select and explain. 
A. Betamethasone, B. Dexamethasone, C. Hydrocortisone, D. Methylprednisolone
D: Methylprednisolone
Answer: D: Methylprednisolone 
Explanation: DOC for fetal lung maturation is betamethasone. Methylprodnisolone is not effective because of poor placental transfer.