This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, 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. Betamethasone, C. Hydrocoisone, D. Predinsolone
A: Dexamethasone
Answer: A: Dexamethasone 
Explanation: Dexamethasone is very potent and highly selective glucocoicoid to be staed before 10 weeks of gestation to suppress fetal androgen production effectively It has a long duration of action and cause marked pituitary-adrenal suppression. DOC for CAH is hydrocoisone but DOC for pregnant women having baby with CAH - dexamethasone REF.Essential of medical pharmacology K D TRIPATHI 6 Edition, Page No - 283