Violation

Tranquilizers and hypnotics 1. are depressants of the respiratory centre. 2. are depressants of the cerebral cortex. 3. may cause physical dependency. 4. may have convulsant effects.

(1) (2) (3)

All of the above.

(4) only

(2) and (4)

(1) and (3)

Please describe the matter of abuse