This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical Illness Complicating Pregnancy, Subject name: Gynaecology & Obstetrics
Best prenatal treatment for CAH is: 
Select and explain. 
A. Dexamethasone, B. Betamethasone, C. Prednisolone, D. Hydrocoisone
A: Dexamethasone
Answer: A: Dexamethasone 
Explanation: Maternal Dexamethasone treatment is given to suppress fetal androgen overproduction and prevent virilization of female fetuses.