'Valium' is an example of

Which of the following is a hallucinogenic substance?

Which part of the poppy plant is used to obtain the drug "Smack"?

Damage to the gastric mucosa is increased by alcohol plus which of the following?

Hallucinogens:

How many of the following substances can be used to treat conditions of high stress and insomnia?
Opium,Charas,Ganja,Morphine,Barbiturates,Heroin,Cocaine,Amphetamines,Benzodiazepines,$LSD$.