Dental Stage IV of ANUG according to Hornig and Cohen is characterized by A Necrosis of the tip of interdental papilla B Necrosis extending to the attached gingiva C Necrosis exposing alveolar bone D Necrosis perforating skin of cheek 💡 Explanation Stage IV of ANUG according to Hornig and Cohen is characterized by ✓ Correct Answer: B. Necrosis extending to the attached gingiva