The most common pre-malignant condition of oral carcinoma is:
(a) Leukoplakia(Ref. Cummings, 6th ed., 1299)All the other choices also are pre-malignant but leukoplakia is the most common premalignant condition.
Leukoplakia
Erythroplakia
Lichen planus
Submucous Fibrosis
Oral Cavity