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
All of the following are CNS stimulants except 
Select and explain. 
A. Amphetamines, B. Cocaine, C. Methylphenidate, D. Benzodiazepines
D: Benzodiazepines
Answer: D: Benzodiazepines 
Explanation: CNS stimulants are amphetamine, methylphenidate, atomoxetine, modafinil, cocaine, pemoline and caffeine.