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': 'β - Blocker with maximum half life \nSelect and explain. \nA. Propanalol, B. Metaprolol, C. Bopindolol, D. Nadalol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nadalol is a non selective water soluble\xa0β blocker with longest half life.\nEsmolol metabolized by plasma esterase has the shortest half life.', 'role': 'assistant'}]