The commonest pre-malignant condition of oral cancer is -: (A) Leukoplakia, (B) Aphthous ulcer, (C) Lichen planus, (D) Erythro-leukoplakia
Answer is A. Ans. is 'a' i.e., Leukoplakia Leukoplakia is the most common (-85%) of the premalignant lesions of the oral cavity.