One of the oldest gaseous anesthetics, popularly known as laughing gas, is
A. butane.
B. diazepam.
C. pentobarbital.
D. nitrous oxide.
Question 2
Animal self-administration experiments and studies of drug choice among humans indicate that
A. benzodiazepines have no dependence liability.
B. rats and people are very different in the drugs they choose to self-administer.
C. short-acting barbiturates are more likely to lead to dependence than any of the benzodiazepines.
D. all of the benzodiazepines have high dependence liability.