Composite resin is CONTRAINDICATED as a posterior restorative material in cases of
1. cusp replacement.
2. bruxism.
3. lack of enamel at the gingival cavosurface margin.
4. inability to maintain a dry operating field.

(1) and (3)

All of the above.

(1) (2) (3)

(4) only

(2) and (4)