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
Calcium channel blockers are used in all EXCEPT: 
Select and explain. 
A. Angina, B. Arrhythmia, C. Congestive heart failure, D. Hypertension
C: Congestive heart failure
Answer: C: Congestive heart failure 
Explanation: None