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. Benzodiazepines, C. Cocaine, D. Methylphenidate', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is `b' i.e., Benzodiazepines CNS stimulants are amphetamine, methylphenidate, atomoxetine, modafinil, cocaine, pemoline and caffeine.", 'role': 'assistant'}]