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': 'All of the following are CNS stimulants except \nSelect and explain. \nA. Amphetamines, B. Cocaine, C. Methylphenidate, D. Benzodiazepines', 'role': 'user'}, {'content': 'Answer: D \nExplanation: CNS stimulants are amphetamine, methylphenidate, atomoxetine, modafinil, cocaine, pemoline and caffeine.', 'role': 'assistant'}]