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
Resistant hypertension when goal is not achieved - 
Select and explain. 
A. 4 drugs + diuretics, B. 2 drugs + diuretics, C. 3 drugs + diuretics, D. 5 drugs + diuretics
C: 3 drugs + diuretics
Answer: C: 3 drugs + diuretics 
Explanation: None