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: Unknown
[{'content': 'Which of the following statins can be administered at any time during the day? \nSelect and explain. \nA. Lovastatin, B. Simvastatin, C. Pravastatin, D. Atorvastatin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Atorvastatin. Atorvastatin and rosuvastatin can be administered at any time of the day due to long half-lives (>12 hours). All other statins have a short half-life (<4 hours), hence given just before bedtime.', 'role': 'assistant'}]