This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adrenal, Subject name: Pharmacology
Drug of choice for pregnant female suspected of having a baby with congenital adrenal hyperplasia is: 
Select and explain. 
A. Dexamethasone, B. Aldosterone, C. Hydrocoisone, D. Predinsolone
A: Dexamethasone
Answer: A: Dexamethasone 
Explanation: To suppress fetal androgen production effectively and consequent virilization, Dexamethasone must be initiated before 10 weeks of gestation. Note: To treat congenital adrenal hyperplasia in baby--> Hydrocoisone is used.