Which one of the following drugs is used for fetal therapy of congenital adrenal hyperplasia

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