The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of following is an oral precancer?   (A) Oral hairy Leukoplakia   (B) White spongy naevus   (C) Leukemia   (D) Speckled Leukoplakia
['(D) Speckled Leukoplakia <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Oral hairy Leukoplakia \n (B) White spongy naevus \n (C) Leukemia \n (D) Speckled Leukoplakia <> possible answers', '  Which of following is an oral precancer? <> context@']