The correct option is
C Antianxiety
Benzodiazepines are drugs used to treat anxiety. They are psychoactive drugs. They are also used to treat conditions like insomnia or lack of sleep. They have sedative and hypnotic effects. They are mild tranquilizers and are prescribed by doctor to get relief from stress and anxiety. They are components of sleeping pills because they have sleep inducing effects. Hence, benzodiazepines are antianxiety drugs.
So, the correct answer is 'Antianxiety'.