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: Ophthalmology
[{'content': 'Contraindication of topical beta blockers – \nSelect and explain. \nA. Hypertension, B. Asthma, C. Tachycardia, D. Hypotension', 'role': 'user'}, {'content': 'Answer: B \nExplanation: β-blockers (non-selective) :- Asthma, COPD, CHF, sinus bradycardia, AV block\nCholinomimetic (Pilocarpine) :- Uveitis\nSympathomimetic agents\n\n\nDipiveferine :- Angle closure glaucoma, cardiovascular disease.\nBrimonidine, Apraclonidine: - Use of MAO inhibitors, hypertensive crisis, Parkinsonism.\n\n\nCarbonic anhydrase inhibitors: - Hypersensitivity to sulfonamide, eye injury.\nProstaglandin analogues: - Ocular inflammation or infection.', 'role': 'assistant'}]