This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
For fetal lung maturation, all the coicosteroids can be used except 
Select and explain. 
A. Betamethasone, B. Dexamethasone, C. Hydrocoisone, D. Methylprednisolone
D: Methylprednisolone
Answer: D: Methylprednisolone 
Explanation: Methylprednisolone is not effective because of poor placental transfer