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: Medicine
Initial Drug of choice for suspected case of acute adrenal insufficiency is: 
Select and explain. 
A. Norepinephrine, B. Hydrocoisone, C. Dexamethasone, D. Fludrocoisones
C: Dexamethasone
Answer: C: Dexamethasone 
Explanation: Answer is C (Dexamethasone): The treatment of choice for acute adrenal insufficiency is Glucocoicoid Replacement Therapy. In cases where the diagnosis of acute adrenal insufficiency is suspected (not confirmed) Dexamethasone is preferred as the initial steroid of choice because Dexamethasone does not compete with the coisol assay. Cosyntropin stimulation testing may be performed while the patient is on treatment.