This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
First line of drug for angle closure glaucoma is 
Select and explain. 
A. Acetazolamide, B. Physostigmine, C. Brimonidine, D. Atropine
A: Acetazolamide
Answer: A: Acetazolamide 
Explanation: Ref: HL Sharma 3rd ed pg no:140 For acute angle-closure glaucoma, the best option is acetazolamide oral or IV for chronic glaucoma, DOC is phf2 alpha analogs like latanoprost