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
Diuretic used in essential hypertension is 
Select and explain. 
A. Hydrochlorthiazide, B. Amiloride, C. Furosemide, D. Acetazolainide
A: Hydrochlorthiazide
Answer: A: Hydrochlorthiazide 
Explanation: None