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
Which of the drug's main action is increasing uveo-scleral outflow 
Select and explain. 
A. Apraclonidine, B. Latanoprost, C. Timolol, D. Brinzolamide
B: Latanoprost
Answer: B: Latanoprost 
Explanation: Ref: HL Sharma 3rd ed pg no:140 DOC for chronic glaucoma is latanoprost- PGF2 alpha analog It acts by increasing uveoscleral outflow of aqueous humor