Proper lip support for complete denture is provided primarily by:: (A) Convex surface of labial flange, (B) Facial surface of teeth and simulated gingiva, (C) Thickness of border in the vestibule, (D) Festooned carvings on facial surface
Answer is B. Proclination of maxillary anterior teeth and the surrounding denture base simulating the gingiva provided for the bulk for lip support in complete denture.