The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Vitamin D deficiency   (A) Does not affect enamel   (B) Does not affect dentin   (C) Does not affect tooth development   (D) All of the above.
['(B) Does not affect dentin <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Does not affect enamel \n (B) Does not affect dentin \n (C) Does not affect tooth development \n (D) All of the above. <> possible answers', '  Vitamin D deficiency <> context@']