Which of the following statements regarding anxiolytics is?

a. Benzodiazepines have low therapeutic indices.
b. Sedatives are often prescribed as part of a pre-operative dru
c. By enhancing the activity of GABA, hyphotics can be sleepagents.
d. Benzodiazepines increase chloride ion influx across neuro hyperpolarizing the cells.
e. Tranquilizer is another term for sedative.