Which statement(s) is/are true about diazepam?
1. It improves performance rating of fine motor skills.
2. It is more toxic when taken with ethyl alcohol.
3. It is available without prescription in Canada.
4. It produces a typical dependence syndrome.

(2) and (4)

(1) (2) (3)

(1) and (3)

(4) only

All of the above.