Violation
In determining the ideal proximal outline form for a Class II amalgam cavity perparation in a molar the (1) axial wall should be 1.5mm deep (2) gingival cavosurface margin must be clear contact with the adjacent tooth (3) proximal walls diverage occlusally (4) facial and lingual proximal cavosurface margins must just clear contact with the adjacent tooth
(2) (4)
(1) (2) (3)
(1) (3)
All of the above