This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Shoest acting benzodiazepine is: \nSelect and explain. \nA. Midazolam, B. Alprazolam, C. Lorazepam, D. Diazepam', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Alprazolam is sho acting hypnotic,lorazepam & diazepam are long acting ,while triazolam &midazolam are ultra sho acting benzodiazepines . Ref: KD Tripathi 8TH ed', 'role': 'assistant'}]