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: Pharmacology
[{'content': 'The property which makes betaxolol different from timolol is that betaxolol: \nSelect and explain. \nA. Is a β1 selective blocker, B. Is more efficacious in glaucoma, C. Produces less ocular side effects, D. Is shorter acting', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]