This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: D.O.C, Subject name: Pharmacology
Drug of choice for prophylaxis of acute mountain sickness: 
Select and explain. 
A. Diltiazem, B. Digoxin, C. Dexamethasone, D. Acetazolamide
D: Acetazolamide
Answer: D: Acetazolamide 
Explanation: Ans. (D) Acetazolamide(Ref: KDT 8th/633-634)Acetazolamide is drug of choice for prophylaxis and treatment of acute mountain sickness.For severe cases of pulmonary edema due to high altitude sickness, dexamethasone is indicated.Best treatment of all forms of high altitude sickness problems is to descent down.