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
Triamterene causes : 
Select and explain. 
A. Hypokalemia, B. Muscle cramps, C. Decrease in urea level, D. Better glucose tolerance
B: Muscle cramps
Answer: B: Muscle cramps 
Explanation: None