input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Portion of tooth covered by calculus or altered cementum is:   (A) Toxic zone   (B) Deposit zone   (C) Instrumentation zone   (D) Take away zone
output: ['(C) Instrumentation zone <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Toxic zone  (B) Deposit zone  (C) Instrumentation zone  (D) Take away zone <> possible answers', '  Portion of tooth covered by calculus or altered cementum is: <> context']