Surgery General 11d63236 The commonest pre-malignant condition of oral cancer is - A Leukoplakia B Aphthous ulcer C Lichen planus D Erythro-leukoplakia High-Yield Explanation Ans. is 'a' i.e., Leukoplakia Leukoplakia is the most common (-85%) of the premalignant lesions of the oral cavity.