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
Drug that does not cause sedation 
Select and explain. 
A. Buspirone, B. Nitrazepam, C. Zopiclone, D. Diazepam
A: Buspirone
Answer: A: Buspirone 
Explanation: None