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
Digoxin may be used in the treatment of- 
Select and explain. 
A. Constrictive pericarditis, B. Cardiac tamponade, C. Atrial fibrillation, D. Diastolic failure
C: Atrial fibrillation
Answer: C: Atrial fibrillation 
Explanation: None