The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Gene for odontoblast differentiation   (A) MAP1B   (B) PHEX   (C) DEN   (D) PHIX
['(A) MAP1B <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) MAP1B \n (B) PHEX \n (C) DEN \n (D) PHIX <> possible answers', '  Gene for odontoblast differentiation <> context@']