This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Seedatives & Hyponotics, 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 o CNS stimulants are amphetamine, methylphenidate, atomoxetine, modafinil, cocaine, pemoline and caffeine.", 'role': 'assistant'}]