This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Surgery
All are premalignant conditions of oral cavity except: 
Select and explain. 
A. Chronic hyperplastic canidiasis, B. Oral submucosal fibrosis, C. Oral lichen planus, D. Leucoplakia
C: Oral lichen planus
Answer: C: Oral lichen planus 
Explanation: All the given options increase the risk of carcinoma of oral cavity but, oral Lichen planus has the least risk as it is Low-risk or Equivocal lesion. Conditions associated with Malignant Transformation HIGH RISK LESIONS Medium-risk Lesions Low-risk or Equivocal Lesions Erythroplakia Speckled Erythroplakia Chronic Hyperplastic -Candidiasis Oral submucous fibrosis Syphilitic glossitis Sideropenic dysphagia (Paterson-Kelly syndrome) Oral Lichen Planus Discoid Lupus erythematous Discoid keratosis congenita Speckled Erythroplakia is also known as Erythroleucoplakia. Leucoplakia Malignancy: -Speckled Erythroplakia > Erythroplakia > Leucoplakia