This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'Ivabradine is used in the treatment of \nSelect and explain. \nA. Ventricular arrhythmia, B. Angina, C. Atrial arrhythmia, D. Hypeension', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ivabradine-direct acting bradycardiac agent is used in angina and in rare cases- CCF As it decreases myocardial oxygen demand. Ref. HH Sharma 3rd ed.', 'role': 'assistant'}]