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': 'Contraindications to use of Beta Blockers \nSelect and explain. \nA. Bronchial asthma, B. Hypeension, C. Tachycardia, D. Glaucoma', 'role': 'user'}, {'content': "Answer: A \nExplanation: * Bronchial asthma is an absolute contraindication of non selective beta Blockers - as they induce bronchoconstriction by knocking off beta 2 mediated adrenergic bronchodilation. Ref:- Sharma's Principles of Pharmacology 3rd Ed; Pg No:- 191-2", 'role': 'assistant'}]