<prompt> Which of the following is considered as an anxiolytic substance?CaffeineCholecystokininNeuropeptide YCarbondioxide  <response>: Anxiolytic substances Anxiogenic substances Benzodiazepines Selective Serotonin Reuptake Inhibitors Beta-blockers Neuropeptide Y Buspirone Carbon dioxide Cholecystokinin Flumazenil Caffeine 