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
First line drug for primary open angle glaucoma is: March 2012 
Select and explain. 
A. Pilocarpine, B. Dorzolamide, C. Dipivefrine, D. Beta blockers
D: Beta blockers
Answer: D: Beta blockers 
Explanation: 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