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
[{'content': 'Which of the following does not act by decreasing Aqueous Formation ? \nSelect and explain. \nA. Timolol, B. Bimatoprost, C. Brimonidine, D. Dorzolamide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Prostaglandin analogues act by incerasing uveoscleral outflow.', 'role': 'assistant'}]