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: Pharmacology
Drug of choice for acute adrenal insufficiency is? 
Select and explain. 
A. Oral prednisone, B. IV hydrocoisone, C. IV betamethasone, D. IV dexamethasone
B: IV hydrocoisone
Answer: B: IV hydrocoisone 
Explanation: Ans. is 'b' i.e., IV hydrocoisone