This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
Strawberry gingivitis seen in 
Select and explain. 
A. Myelocytic infiltration, B. Phenytoin toxicity, C. Wegner granulomatosis, D. Klipel renaunay syndrome
C: Wegner granulomatosis
Answer: C: Wegner granulomatosis 
Explanation: Wegener's granulomatosis is a rare multi-system disease characterized by the classic triad of necrotizing granulomas affecting the upper and lower respiratory tracts, disseminated vasculitis and glomerulonephritis. Oral lesions as a presenting feature are only encountered in 2% of these cases. Hyperplastic gingival lesions or strawberry gingivitis, is a characteristic sign of Wegener's granulomatosis. The latter consists of reddish-purple exophytic gingival swellings with petechial haemorrhages thus resembling strawberries. Recognition of this feature is of utmost impoance for timely diagnosis and definitive management of this potentially fatal disease. Ref - pubmed.com