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: Pediatrics
Which one of the following drugs is used for fetal therapy of congenital adrenal hyperplasia 
Select and explain. 
A. Hydrocortisone, B. Prednisolone, C. Fludrocortisone, D. Dexamethasone
D: Dexamethasone
Answer: D: Dexamethasone 
Explanation: These patients with congenital adrenal hyperplasia require lifelong treatment.
Patients with salt wasting and virilizing forms should be treated with hydrocortisone(10-15 mg/m2/day)and fludrocortisone (0.1mg/day).
After completion of growth, synthetic glucocorticoid preparations( dexamethasone, prednisolone)can be used