Violation

Cephalosporin antibiotics 1. may be cross-allergenic with penicillin. 2. have a narrower spectrum than penicillin. 3. have a mechanism of action similar to that of penicillin. 4. may cause cholestatic hepatitis.

(2) and (4)

(1) and (3)

(1) (2) (3)

All of the above.

(4) only

Please describe the matter of abuse