This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
Drug of choice for acute congestive glaucoma is - 
Select and explain. 
A. 1-2 % pilocarpine, B. Timolol, C. Levobunanol, D. Atropine
A: 1-2 % pilocarpine
Answer: A: 1-2 % pilocarpine 
Explanation: Pilocarpine eyedrops should be staed after the IOP is bit lowered by hyperosomtic agents. At higher pressureiris sphincter is ischaemic and unresponsive to pilocarpine. Initially 2 percent pilocarpine should be administered every 30 minutes for 1-2 hours and then 6 hourly. Ref AK KHURANA 4TH EDITION PAGE NO 229