input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following structure is not present on floor of third ventricle?   (A) Optic stalk   (B) Third nerve   (C) Infundibulum   (D) Mammillary body
output: ['(B) Third nerve <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Optic stalk  (B) Third nerve  (C) Infundibulum  (D) Mammillary body <> possible answers', '  Which of the following structure is not present on floor of third ventricle? <> context']