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
[{'content': 'Digitoxin is used in A/E - \nSelect and explain. \nA. Hea failure, B. HOCM, C. Supraventricular tachycardia, D. All', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'B' i.e., HOCM Congestive hea failureCardiac arrhythmiaso Atrial fibrillation", 'role': 'assistant'}]