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': 'Which of the following is not a cardioselective beta blocker ? \nSelect and explain. \nA. Nebivolol, B. Atenolol, C. Betaxolol, D. Oxprenolol', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Oxprenolol", 'role': 'assistant'}]