input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In root fracture of the apical one-thrid of permanent anterior teeth, the teeth usually   (A) Discolor rapidly   (B) Remain in function and are vital   (C) Undergo papal necrosis and become ankylosed   (D) Are indicated for extraction and prosthetic replacement
output: ['(B) Remain in function and are vital <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Discolor rapidly  (B) Remain in function and are vital  (C) Undergo papal necrosis and become ankylosed  (D) Are indicated for extraction and prosthetic replacement <> possible answers', '  In root fracture of the apical one-thrid of permanent\nanterior teeth, the teeth usually <> context']