The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Dentin is composed of   (A) 70% inorganic   (B) 30% inorganic   (C) 50% inorganic   (D) 96% inorganic
['(A) 70% inorganic <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 70% inorganic \n (B) 30% inorganic \n (C) 50% inorganic \n (D) 96% inorganic <> possible answers', '  Dentin is composed of <> context@']