This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': "The following are contraindications to beta-blockers except ( REPEAT) \nSelect and explain. \nA. Bradycardia, B. Tachycardia, C. Bronchial asthma, D. Raynaud's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Beta blockers are used In the treatment of tachycardia as they are sympatholytics.', 'role': 'assistant'}]