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
True about benzodiazepine is: 
Select and explain. 
A. GABA mimetic, B. GABA facilitator, C. Not a safe drug, D. High absue potential
B: GABA facilitator
Answer: B: GABA facilitator 
Explanation: Ans. is'b'i.e., GABA facilitatorMechanism of action of benzodiazepines (BZDs):Acts on GABA-A receptors.BZDs receptor increase the conductance of Cl- channel.BZDs do not themselves increase Cl- conductance, i.e. they have only GABAfacilitatory but no GABA mimetic action. (Barbiturates have both GABA facilitatory and GABA mimetic actions).