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': 'First line drug for primary open angle glaucoma is: March 2012 \nSelect and explain. \nA. Pilocarpine, B. Dorzolamide, C. Dipivefrine, D. Beta blockers', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: D i.e. Beta blockers Drugs for primary open angle glaucoma Adjunctive drugs for primary open angle glaucoma are dipivefrine, dorzolamide & pilocarpine First line drugs for primary open angle glaucoma includes beta blockers, brimonidine & prostaglandin analogues', 'role': 'assistant'}]