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
Earliest drug used in acute angle closure glaucoma – 
Select and explain. 
A. Diamox, B. Pilocarpine, C. Atropine, D. DFP
A: Diamox
Answer: A: Diamox 
Explanation: Approach in acute congestive glaucoma 

Start i.v. mannitol or i.v. acetazolamide
When IOT starts falling, start topical pilocarpine or β-blocker (timolol).
Apraclonidine/latanoprost may be added.
Once i.o.t. is reduced, surgery is done.
Diamox is acetazolamide