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
Digitoxin is used in A/E - 
Select and explain. 
A. Hea failure, B. HOCM, C. Supraventricular tachycardia, D. All
B: HOCM
Answer: B: HOCM 
Explanation: Ans. is 'B' i.e., HOCM Congestive hea failureCardiac arrhythmiaso Atrial fibrillation